GamePro: "The girl gamer is a rare breed of lady. Like ninjas or flying unicorns, she remains perpetually shrouded in myth and shadow. Statistics would have us believe that over 40 percent of gamers are female - but come on. When was the last time you got trash-talked on Modern Warfare 2 by the dulcet tones of a woman? The fact is: you have a better chance of meeting a girl with an interest in Gauguin than gaming (girls are a lot smarter than us, y'see).
But that's not to say that female gamers don't exist. You just need to adopt the right mindset and know where to look.