Is nerd culture really more misogynist than any other subculture? I think it might also be possible many nerds just hate attractive people and 'nerd culture latecomers' (nerds are all secretly hipsters with out the ironic fashion statements?)... I mean I'm sure that since so many nerds are male and perhaps harbor extra (misplaced) resentment for pretty women due to the added sexual frustration.
I sorry to bring a INTERNET MEME into the picture but I think this one illustrates why perhaps that sexist meme "Idiot Nerd Girl" mayhap at least be similar (though certainly not identical) to this concept gender swapped:
A general dislike of those that were not social lepers for liking 'nerdy things' because liking these nerdy things now-a-days doesn't make one a social leper. (That REALLY goes for video games actually, if not strictly 'gamer culture',
http://penny-arcade.com/report/editorial-article/what-the-mainstream-press-wont-report-gamers-are-everywhere-and-were-doing-)
So there is also resentment for people who did not go through horrible early life experiences for their interests. Nerds seem to collectively believe everyone should suffer like they did in the 90's and back, especially people that may have been involved with 'bullying' or apathetic to their plight if they had lived in such an early less nerd-friendly age. Its a completely unreasonable expectation. Its bitter. But there is a sick logic to it. Nerds assume people with any level of attractiveness would have been the same people to make their lives horrible just 20-30 years ago. Nerds assume all attractive people are social cowards that would tolerate and even perhaps participate in their misery.
Now I know you specified the video games culture as well. I'm going to assume you mean 'hardcore' gaming rather than all gaming culture as a whole. Hardcore gaming culture with video game reference t-shirts, love of the konami code, and of course first person shooters. But is this SPECIFIC nerd culture more gross than any other nerd subculture? I guessing none of you believe that. Comic book nerd culture is generally considered just as bad... if not worse about sexism than video games. Sure comic books typically have more women involved with their stories than video games... but almost universally sexualize them. Don't get me wrong, video games sexualize plenty women if not most, but you likely could cite far more female characters in video games that are tasteful than comic's what with the 'boob's & butt in a single frame' trope.