I've had some women managers in my time...they are either real good or as you've described.
A few years ago I was directed to take over a department with "problems". The problem was, more than half the women in it were more interested in stabbing each other in the back over issues other than work.
Anything from what clothes they were wearing to how so and so insulted me x years ago so I don't like her or those who talk to her.
They would fight over the dumbest issues and not concentrate on work.
Took me two years to get everyone moving in the same direction at the same time without the petty garbage taking over.
Funny thing thing was, when I left to go back to my real job, I recommended my replacement be one of the women. The fact she hated the pettiness worse than me had absolutely no bearing on her selection.
I guess I am just biased because in general, I get along better with men than I do with women. It has been my experience since I was a teenager that generally, I repeat generally (just in case someone decides to jump my s*** over this), women are more shallow than men. I just can't deal with all the nail polish-pantyhose-gossip-oh he's so cute conversations. And women tend to judge people on how they look. As a woman, if you are better looking than another, you will be treated very badly. To me, that has nothing to do with mental ability or job performance, and appearance doe not seem to be a factor with men. Unless the woman happens to be a smokin hot 19 year old. ;)