Most of the women I have rolled with have had awesome technique. I must admit though that when I rolled against my head instructor (who is the first female to earn a bjj black belt in Europe) I did once use all my strength to crush her, as I was 16 stone and she was barely 8 stone, and felt good when I tapped her with a toe hold as I'd tapped a black belt. All I can say to my past self is, what a complete dick! I think you should tone the power, crushing, strength techniques down when rolling with most females, unless they have a beard of course.