I think women are really good at making friends and not good at networking. Men are good at networking and not necessarily making friends. That's a gross generalization, but I think it holds in many ways.
Potentially significant, by the way, because we don't know exactly what's in Matt Cooper's notes, and we don't know - and we don't still know the answer to the crucial question of whether it was Rove or somebody else that revealed Valerie Plame's name to him.