I'm being mostly sarcastic, a little bit of a jerk, and also slightly nice. No Twat though.
Pointing out that you are a girl gamer and thusly making the suggestion that teenage girls are gamers (IE its a common thing) is kind of silly. Is it true? Maybe. But a single person is never an accurate model.
Some people smoke all their lives and live longer than people who don't. Do most people? Not at all. Most die earlier. But people tend to grab that one or two unique cases and act like that's the reality.
I've met teenage girls who were gamers, however for the most part they played DDR (which was fine because so was I). I don't however see a large market of girls playing real games in their teen years. If they did I imagine we'd see far less of those hannah montanna PSP packs and more quality games being targeted towards girls instead.
But again, I was more mocking you for using the "If I am A then everyone must be A" mentality
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