I agree with Wardens.
I'm female (duh!) and I've noticed how men are much, much more receptive toward me in any job situation/field/research professional setting. I always feel a slight advantage when I am interviewing or working with a male. On the other hand, I've noticed some tough competition for attention, weird vibes etc when I've worked with a few women.
I can't explain this, but I have noticed it too. Weird, huh? Perhaps the men that we interview with might feel like they shouldn't be too _________ (fill in the blanks) because women might construe it the wrong way? I don't know. Also, I've noticed how when I apply make up and look really nice at work, people listen to me much more than when I may have a pony tail and jeans. Know what I mean? In other words, when I am looking presentable/nice in a professional setting, I have to speak less words and be less assertive and still get my way. Just a pattern I've noticed.
On a tangent--my fiance and I went to buy some second hand furniture for the appartment and the weirdest thing happened. As we got out of the car, I told my fiance "if it's a guy, let me do the talking. If it's a girl, I'll let you handle it." And anyway, so when we went in there, it was a guy, I DID do the talking, and we got the furniture MUCH MUCH cheaper than we would have. I have a feeling it has a bit to do with gender bias and also a bit to do with personality. Right?