Unless it's in either of the extremes, I don't really care.
But I DO notice if he wears a tight pink shirt. Or if he's the kind of guy whose pants hangs from his thighs and showing his undies to the world. Or if he's not wearing his hat properly. Basically, if he dresses like a douche, I'm judging him.
Yes girls do look at a guys sense of style. Like for example if a guy dresses like a slob people make thing especially girls that he does not have the best hygiene around. When a guy dresses a little better or more stylish women do tend to notice him more. I think clothes should not determine what person is like just because of they way they dress but people still do it anyways.