There's gender imbalances in lots of places now between executives, teachers, prison, the military, some of those are positive places to have a gender balance in.
I've seen lots of discrimination against females in the places I have worked, behind their back for the most part. I have also seen examples of positive discrimination in their favour, but not as much.
Personally, I think it's a manufacturing line of institutions that lead to a hireable tech worker - and if you go back each step along the assembly line, the female involvement is higher percentage wise.
So I think the lower representation is a product of women opting out of maths and science based subjects at an early stage, and later choosing the medical profession over engineering.
It would be interesting to get some statistics over the span of a career, do a higher percentage of women change career away from tech once they start?