Capability:
I have trained good ones and bad ones of both genders very little difference other than generalized personality trait differences.

Paired together for a bid or 4 day trip:
The female pilots I have flown with or taught are more pleasent in general, which helps on a long day wx, mx sucks etc.

Family life:
All I can say is good luck. Sure being a pilot is cool for a little bit, but...

Preferential hiring:
Very little has been said on this. You will be at an extreme advantage over your male counterparts. You will get the interviews first......& I mean period. I know individuals who got jobs against the company's own "so called policies". I will leave it at that.