Hmm. I tend to think women are better at noticing our own sexism in general, since we can frame it as throwing off the shackles of the sexism that was forced onto us by society etc and thus avoid the whole "Acknowledging that we are personally complicit in oppression" thing that seems to go completely against human nature. But I agree we're not so good at acknowledging it when it gets to the point of us being actively nasty to other women, since we can't frame it that way any more.