Thank you, Jim. Though this issue has more awareness these days, it is still a problem. I'm glad there seem to be so many people who seem genuinely convinced that this is not a problem anymore, but I would venture a guess most of these respondents are male who truly do not personally have an issue with this (which is fantastic).
I see this problem online, in video games, in comic books, in certain genres for movies and books... In many places. Someone wanted examples, and I gave up mentally cataloging all details of what's happened to me because they all just became more of the same over time.
Is it better than five years ago, ten years ago? Yes. But in the meantime, over the course of several years, I have opted to give up on any multiplayer outside of Assassin's Creed, physically going to video game stores, and engaging in conversations with people I don't know well about the things I love and am passionate about. I've been asked "oh, your boyfriend plays it, right?", "Well, yeah, but most girls pretty much play only Final Fantasy, don't they?", and "Oh, well, you just liked Avengers because of the actors, right?" more than once, from several different people.
And I have a pretty easy time of it compared with many of the other gamers I know who happen to be female, since I work in IT. I literally do not know a female gamer of my acquaintance who has not had condescension or antagonism directed towards her for playing in that playground (oh, unless they 'just' played Farmville or SIMS - those are fine for a girl to like. It's worse for those whose primary enjoyments are FPS or Sports games.)
By this point, my habits have been formed, and it would take a lot to convince me to change them simply because "it's better now." I hope the next generation of gamers who happen to be female reap the benefits of this time in which more guys respond with "What? This is still a problem?" than "Well, of course girls don't really mean it!"
But please don't dismiss the experiences of those who have withdrawn from a community because you haven't seen it yourself. It's out there. It has hurt people. And dismissing it should not be your first instinct.