I dunno, it seems doubtful to me. Once you leave your seat and it's a good seat, it'll be snatched up immediately. I really doubt that the people counters can get a real accurate count of who's in the room. Think of it this way, when a panel ends and a huge batch of ppl leave, do they count them? It's not possible, ppl move fast and there are multiple exit doors. So how is it possible to get an accurate count? What they do base it on is how many empty seats are left.