Erm, the demographics are generally considered to be 18-35 male, for gamers. I know female gamers younger than that, but it's probably not completely awry. I do know many people over the age of 30 who play games though, you meet especially a lot if you play MMOs and such. Not so much with WoW, it seems, but with FFXI and CoH I met plenty of gamers aged 25+, more than were younger than that it seemed.