Back in the 80's and 90's, techies (men and women) felt the same way about society in general. They defensively carved out bubbles of welcoming space for themselves, where they wouldn't be made to feel weird. Eventually it stopped being weird to be a techie. These girls are in a disadvantaged minority, and they're carving out their own bubble where they feel less weird.

Also, according to women hackers, it's important to increase the visibility of women in tech right now so I think they're doing fine. "Lack of female role models" is the biggest deterrent for women in tech http://tech.fortune.cnn.com/2013/04/30/the-biggest-deterrent...