First, let me make a quick comment on this. I'd like to defend the people, but I'd also like to defend the con itself. They put in a lot of effort to get Nami Tamaki and her presense made quite a few people very happy. (I was watching my roommate, who's a huge fan of her's squeal and go nuts- it was really amusing. >D)
However, they originally had their cap for the cosplay set at 60 people, if I recall correctly- and they actually allowed 72 in before finally capping it. I don't know details exactly, however... that was the case. I was actually shocked to hear that they made it to 12 over the cap. Second off- I'm actually saddened to see that people are complaining when there /was/ the original 3 minute rule in place, like always, which A-Kon has always been 'nazi-like' over by reputation. If you're still on stage at 3 minutes, they will shut the lights out on you.
You don't need that long to get the point across anyway. The first place group was the Mortal Kombat group which was just /awesome/, afterall. They were just a walkon.
What I'm upset about is that they've always had strict time arrangements. Nami Tamaki was ONLY performing at that time- it seems that perhaps while everyone wanted to see Do As Infinity or Psycho le Cemu, or Camino... (Psycho le Cemu got two concerts, even)... People will complain when another artist is slipped in for a short 30 minute concert during the cosplay judging.
I'm incredibly amazed that A-Kon was able to get its cosplay to work over an hour and fifteen minutes. It was a fun cosplay too. I had fun backstage with the other groups. That's what it's all about, right?