Yeah, I've noticed something like this too: the dynamic in groups of women is often far different from what you find in groups of men. Mixed groups are different again, and in my experience, better. I dunno that it can be generalized into a broader principle, but anybody who thinks men and women aren't wired differently isn't paying attention. What I've observed in my working life, more specifically, is that women generally cannot work with a woman they personally dislike, but men seem able to pull together on whatever activity the group's working on regardless of personal feelings.
To put it another way, men compartmentalize their lives into categories like personal and professional and generally keep them separate; with women it's all personal and the group has to click socially first, regardless of whatever else might be going on. I concede this observation is completely unscientific and purely anecdotal, I really have no idea whether or not it's generally true, and I make no claims about one way being better than the other. It's just what I've noticed in my life, and I'd really like to see some sociologist or psychologist take a close scientific look at it.
And since the subject of PMS has been raised, and having just been through a week of it with the females in my household, I'd like to remark that PMS actually means Periodically Missing Sanity.