That booth girl was just as stereotypical in her own way. Also, of course there are sterotypical nerds there, but they are not all like that. Go do any convention with 100k people and you can easily find a dozen really strange people to interview, but there are at least 10 regular dudes for every such strange dude.
That girl who she thought was into fantasy called herself an ego-shooter. What the hell is an ego-shooter? Some german genre?
Ego-shooter = First Person Shooter