It's naive to pretend that some of the comments against her aren't a bit sexist...considering a few incredibly patronizing remarks I've seen from pundits and by some on this board. I just don't think that's a driving force with the vast majority of people who've come out against her. It's more of a matter of people being upset because no one the list of candidates they've been told are outstanding (by pundits) was nominated. They want what they think is a known quantity...again, because they've been told that X, Y and Z are "acceptable".
That said, I wouldn't have made that charge in public.