it's true that a lot of people think girls just don't play this game. before reading this thread, I knew more 10-year old boys who played then girls. I met two girls in-game today, and quite frankly, I think it's a good thing. people don't think of video games as a social venue, but they are.
look at things like everquest. you have people meeting in game, and then getting married later. the do quests together, blah blah blah. I think it would be just as romantic to some to blow the head off of a spy together.
anyhow, I'm glad that stereotypes are beginning to fall a bit. usually, when you think of these type of games, you assume you will be playing with guys. it's good that those misconceptions are starting to get kicked.