I watched the game last night, and thought some of those calls were atrocious. It's impossible to know what was said at the court level, but it just seemed like some discretion would have been in order.
I think that a lot of young professionals over-compensate and try to act "tough" when they're new to a job. In my own field, I've seen this with both men and women, but perhaps particularly so with new female criminal attorneys. It's still a fairly male-dominated field, where there is no doubt patronizing going on by some of the male attorneys, and I see some of the younger female attorneys develop a less congenial personality than some of their male counterparts. There's probably some of my own sexist observations in that anecdote, but I wonder if something similar happens with new female NBA refs? They're in a male-dominated field, and they're given extra scrutiny because of their gender. They're on a national stage, where their very presence makes them "different". Wouldn't it be natural for them to act a little tougher?
Of course, that's all dime store psychology, and I haven't seen any evidence that this ref calls any more techs than normal. She seemed a bit out of line last night, but it could be an isolated situation. Or, maybe the Clippers are just jerks.