A while ago I used to train ab-initio pilots and came to the conclusion that there were no such things as 'average' lady pilots. Why? Because if you told one that her flight had rated an average assessment, then she'd usually try to do better - whereas if you told a bloke his trip was 'average' then he'd settle for 'good enough' and slope off to the pub with his mates! And the ladies would help eachother when it came to learning checklists etc.
Very, very few lady students were truly awful - but they'd had the strength of character to give it a go. Whereas the equivalent bloke would have never bothered even trying to do better.
I have found, however, that lady student pilots were rather more prone to struggle if they had an unreasonable instructor. I inherited at least a couple who had been flying with an insructor who didn't believe in lady aircrew - but given a chance to show that they could do the job, they both did OK!
Still remember a lady DanDare pilot getting her pax home during a Spanish ATC strike by calling their bluff and accepting a cruise level of FL 170 for her '707!!