This has been my experience too. I have noticed the women I have trained learned faster, paid attention and did the work to the letter. The guys on the other hand, I would have to babysit and keep checking up on them.

What annoys me is the pay discrepancy too, I always make sure to speak up to management if I have a female on the team that I feel is being underpaid and I encourage them to ask for a decent raise when it is merited. It is a small act but equal responsibility deserves equal pay. Be the change and all that.