Well, considering I DO have a vagina, I would guess that I do know a little bit about women. LOL. In addition, I have had 4 children, one of whom is male, I have thought about and discussed circumcision- with female friends and with some men, too.
You might want to venture over to babycenter.com and check out some of the expectant mother forums and see the debate that goes on about this topic. There even used to be a debate board dedicated to the subject (it has been changed to read-only, because the topic was too "hot.") I also believe that Mothering magazine (and its associated bulletin boards at mothering.com) is very anti-circumcision. It's a fairly liberal and vocal (there is a gay parenting board for example) group over there.
I didn't have kids. And the women who did have the kids, boys included, NEVER brought up the subject.
Mothering Magazine speaks for all liberal mothers/women? I seriously doubt it. Anecdotal evidence is all there really is....and I WAS speaking anecdotally.
Finally, it really WASN'T a topic of discussion when I was younger. Now, everything is....which is probably pretty good. But, trust me, outside of the group of young parents (mostly young mothers) the topic ISN'T discussed. It truly isn't. Lol. And I don't care to venture to any of these sites....they put me to snooze-control very fast.