Prologue
Okay, so let me start off by just telling you up front that no, he did not make it into further rounds of the audition. He was let go after the second round of auditions in front of show and label producers. But I must say that this was an amazing experience for both me and my son. So, what exactly happened? Well, let me tell you... oh, and yes I know they said something about photos, but I conveniently forgot. 
Day 1
As I mentioned briefly before, the process started with registration. Registration opened on Monday at 7:00am and continued 24/7 until 11:00am on Wednesday (with Wednesday being the actual audition date). We (me, my son, his friend and her mother, who drove) decided to go on Tuesday morning so that the time off needed from school and work would occur over two consecutive days instead of a day in between. Because most of the people showed up on Monday, we were able to get in and get out in roughly 15 minutes. We were given color-coded wrist bands and told to be in line the following morning no later than 6:30am.

Day 2
We carpooled again and made it back to the audition location at around 6:00am. Where yesterday saw the street in front of the building completely empty, this same area was congested with thousands of people by the time we arrived, and thousands more filled in behind us. Because everyone had color-coded wrist bands, there were no lines necessarily. Just throngs of people pushed together between the barricades in the street. They assured us that everyone who was there would be seen that day.

In the meantime, they proceeded to film the crowd, the street, the building, the skyline, etc. for the promo drops in the upcoming season. They had the crowd sing along to a few uptempo songs by P!nk, Nikki Minaj, Beyonce and One Direction. You know, the whole fist pump, hand waving, jumping excitement as if we weren't nearly as cold as the constant huddling and shivering indicated between takes.

We met some very cool people in the crowd. In particular were two twin guys who were just fun to be around (they are 3rd and 5th from the left in the picture below). My son and his friend, along with the people we'd met, all decided to sing their audition songs to one another.

This opened up the flood gates as pockets of people all around us started to sing various songs as well. Some were good. Others, well... it's a wonder they were there at all.
It was a bit surreal at first, but the excitement among the crowd was steadily increasing along with the temperature outside as the sun rose higher.
We were finally shuffled inside and into our specific section. The sections in the arena determined the order in which you'd audition.

People who registered throughout the day on Monday would be seen first, followed by Tuesday registrants and so on and so forth.

The section we were in was FINALLY taken down to the audition area around 7:30pm. Yes, that's PM!

Inside the black curtained booth were two judges, one male and one female. He had a chance to sing one song (of the three he prepared) and was told yes by the both judges! This meant that he was given a yellow slip of paper that granted him access to the YES Room (that's what they called it).

Once in the YES Room, we filled out additional paperwork and were given our call time to come back the next day. Our call time? You guessed it... 6:30am. Unfortunately, his friend was given a call time of 10:30am which meant we wouldn't be able to carpool together. 
Day 3
Since we didn't carpool, we were able to wake up an entire 15 minutes later than before!
As it happened, we made good time on the road and arrived at our usual time of 6:00am. They had lines that were separated by category: Boys, Girls, Groups and Overs (people over 25).

We were back inside the arena by 7:00am and were prepared to wait for hours. This time, the process went much faster. After a bit of shuffling from section to section, it was my son's turn to audition around 9:45am.
We entered the enlarged curtained booth and again there were two judges. This time they were both men. They asked him a series of questions including his age, what school he went to and the significance of a whistle he wore with his outfit. He told the story (that we made up for the occasion, mind you) that his younger brother is an amazing athlete. Because his interest in music is very different than his brother's interest in sports, the whistle symbolizes his support for his younger brother when he's performing or auditioning. They loved the story.
Then they asked if there was anyone else in his family that sang. He smiled, pointed at me and said, "Oh yeah, my dad sings too. He's amazing." That's when they asked me if I was auditioning too. I told them no. I was just there to support my son 100%. They told me I should reconsider and to upload an audition video to the website. Then they asked me what I did for a living. After telling them, they encouraged me to audition once again. I just smiled.
Then they turned their attention back to my son and asked him to sing. Sadly, after singing two of his prepared songs, they told him, "Unfortunately, today is going to be a no. Thank you for coming out." and was unceremoniously dismissed. 
Epilogue
While we understood that this isn't really a talent competition, we did wonder what it might have been that caused the judges to pass on my son. There were several people put through who weren't nearly as talented. But they were characters. Either wearing outrageous outfits or sounding outrageously horrible. I don't expect them to get beyond the audition in front of the judges. But it'll make for entertaining TV I'm sure.
I think perhaps the fact that my son is a minor and then told them that he came from a divorced home may have played a part. I know that there are many organizations who don't want the headache of dealing with minors from a divorced home. Too may potential legal issues if the parents don't get along. Maybe it was an unofficial rule for thinning the crowd. I don't know. But since he turns 18 in June, I encouraged him to try again next year. I think he will. 
NOTE: It's not a coincidence that I didn't mention the name of the show in this post. We were told that everything was strictly confidential if you advanced to further rounds of auditions. But even though my son was cut, I still don't want to jeopardize his chances in the future. So please don't mention the name of the show in the comments either. Thanks. 