Avedon has a good read on this:
Frank Rich says the disarray among Democrats and smooth sailing McCain is just a media narrative that has no basis in fact. They keep pushing the idea that vast numbers of angry old Clinton supporters are splitting the party, although in fact most of Hillary's supporters, including the women, are supporting Obama in the general election. Who does it serve to keep playing out this story? Well, it serves the media, who are still in love with McCain and too bored to discuss the massive gulf between the two candidates on policy issues. But most of all, it serves John McCain, who is still passing himself off as someone who diverges from the radical right-wing agenda. Disturbingly, too many members of the liberal blogosphere are also keeping this story alive. Folks, a word to the wise: Quit railing against the alleged Hillary-to-McCain defectors and devote your energies to educating people about what a stinking pile of crap John McCain really is.
At what point I immediately thought, "True, but good lord the 'feminist' defectors are showing up in the comments at all sort of feminist blogs and putting up YouTube videos and generally putting a lot of work into creating the illusion that their numbers are larger than they really are. It's like they're getting pa---"
At which point I slapped myself on the forehead and said, "Fools! We're all fools!" I'm not saying every woman who leaves comments saying, "Well, I'm a feminist, but I'm just so mad about Obama I'm going to vote for McCain," is a plant. I'm just saying that if I were running the McCain campaign, I'd make absolutely sure that such plants were out there.
