I think women learn better around / from women for a number of reasons. The most important reason, to my way of thinking, would be b/c teachers tend to teach what they think that their students need to know. Women are more in tune with the needs and weaknesses of upcoming women shooters.
Male teachers might know or intuit some of this, but they are just doomed to lag on the "been there, done that, I know what you're thinking" scale.
There are other reasons, but that's my number 1 and I'm sticking to it.