Uh... yes? Are you trying to make this some big "gotcha!" on NATCA? ATC does skew male, the union is trying to make a point of that and is trying to highlight women across the NAS.Aren't they basically saying that ATC is gender-biased?
I don't think anyone is saying in so many words that training failures or certification rates are biased for or against women. It would be neat to see what the ratio is coming into the agency and going out as CPCs.