As is this is what male employers want. The fact women usually aren't known for their IT experience creates these biases, but i feel as people become more open minded, this will no longer be an issue. An experience in one place i noticed, can be unique as oppose to another. Well VERY judgemental. If you lose out because they pass judgement on your appearance, i feel it is a sad sad thing.
Stupidity applies to all sexes.
If you are already defending yourself because of experiences that have happened to you, you are the one being judgemental. We can't blame this whole dressing for the interview bias on men though. Most women view attractive women as threatening, especially in the workplace. In an interview I want a woman to concentrate on what I say, and a man to concentrate on how I look as well as what I say. I can honestly say it is as stressful to interview someone as it is to be interviewed.