The way I see it, this coming from a early 20s male (read, shall we say, constantly aware of the opposing sex), is that that attempt to be polite to a woman has nothing to do with her being a woman in tech, but simply being a woman in a social situation.
I guess what I'm trying to say is that it's pretty normal for a guy/girl to alter his/her behaviour when in a social situation with a member of sex he/she's interested in. Eveb uf the situation in question is supposed to be 100% platonic and/or work related. There is a limit, of course, to how far we can/should excuse this behaviour in people. But I don't think it's fair to stomp on people when they behave different within limits.
Because you _are_ a woman, and it _does_ make a difference, but obviously not in the sense that you'd be any more/less competent because of your gender.