The GAMA trade show is an industry insider show and not for the general public. I attended two years ago and there was a smattering of items given out but only to those who owned Game Stores.
I understand last year was better, but the time I went there was very little gaming going on. I was surprised that most of the game companies did not attend the after hour gaming in the main hall. And at that most the gaming was minuatures or CCGs.
Let me just expand upon this to say that if anyone is seriously considering going into game publishing, they should consider attending. GTS is a great place to make contacts and to learn a lot about the trade. But Brent is 100% correct that it is a trade show, not a convention.
Actually I think the after-hours gaming was more active (and beneficial) two years ago than last year. It was nearly impossible to hear what you were playing this year because they were showing some movie or having some big publisher (forgot which one) making annoying announcements with the microphone constantly. I can't remember if it was last year or the year before that one night we couldn't get any tables at all because the WizKids folks were using them all for something...