Yea he's a bit off, but I can understand it. My wife constantly gets belittled when she goes out to find good games. She said everyone kept recommending the Sims. Which she did admit she liked, but she prefers games like Skyrim and World of Warcraft.
In the same way you think your with a gamer girl because she claims to be one. Then you find out she only considers herself one because she likes guitar hero. Someone like me who spends 20-40 hours a week gaming would just piss that girl off.
A woman who plays World of Warcraft in the guild Exodus (Nihlium wanted her, but she didn't live in Europe) definitely understands.