For E3? I wasn't under that impression. Every E3 evaluation I've ever read has always given me the impression that the majority of people there were just regular people. I always assumed that it just cost an assload to get in, though.
note that E3 is a trade-only event and is not open to the general public. Individuals who are not able to document their direct, professional affiliation to the interactive entertainment industry are not qualified to attend.