I do not quite agree.
It would be silly to argue that sexism doesn't drive people away, of course it does. But being incredibly sexist hasn't prevented other forms of media from being incredibly popular with women. Cosmopolitan magazine is sold in more than a hundred countries and Twilight was a huge hit. Today I watched (endured?) a movie called Three metes above heaven that is so disgustingly sexist that the romantic relationship depicted in it starts with the guy physically abusing the girl and threatening to rip her best friend's ear off. If sexism were such a big factor in driving women away this wouldn't happen.
Hell, gaming is now more popular amongst women than it has ever been and it's not because the industry has done much to market to them. I would even venture that casual, free to play and mobile phones, in which the female market share has grown the most is the least concerned about not being sexist.
This is enough for me to think the hyphotesis isn't valid.
Feel free to give me your thoughts
