That seems to reinforce my theory on lack of women in STEM. People look at STEM and think this is where the smartest people go. Not entirely true. The people in STEM are smart BUT they are also are not typically social. I don't mean they don't get along with people but that isn't their priority. The work is the priority and working with other people interested in the work is fine.
What the really smart people that are social do are become entrepreneurs, politicians, doctors, and lawyers. Since women will tend to be more social I think that is the reason you don't find as many in STEM. Not only do they have to be smart but not focused on social aspects. Most of the female engineers that I've worked with that actually like engineering tend to act more like a stereotypical engineer. Focus on the work and not on the social aspects. They are nice people but there focus isn't on making you like them but getting the job done.