In this place of many flying schools close together there are two of us lady CFIs and nine gent CFIs. I have never sensed any difference in the way myself and the other lady are treated compared to the guys by others or amongst ourselves. Nor are we expected to wash up the coffee cups after CFI meetings. The local independant ATO is a lady. There are a couple of ladies in the tower, and the airport manager is a lady. Maybe we're all too busy getting on with our jobs to notice prejudice and discrimination, or maybe there simply isn't any.
Perception of prejudice and discrimination can become a self fulfilling prophesy IMHO.
Sorry to the girls who don't agree with me.