Okay, in case you lack comprehension skills, I'll spell it out for you so that my posts are specifically tailored to miniskirts and you can get off on your miniskirt fetish.
Follow me on this logic (carefully now, I wouldn't want to be misunderstood again):
1. Appearance/mannerism is a part of the interview.
2. Miniskirts falls under the category of appearance.
3. I don't think appearance, in any way, should be used to judge a person's qualifications.
However, the way they are dressed may say something about how seriously they take the interview at worst, or how ignorant they are about the importance of satisfying a stuck-up, judgmental, admissions committee at best. So while I would be giving them the benefit of the doubt, you would rather judge people. Fair enough - that's your prerogative. Whether that is right or wrong (point 3 above) is a whole different discussion.