Men were more confident across all age groups, with 70% of males having high or very high levels of self-confidence, compared to 50% of the women surveyed. Half of women managers admitted to feelings of self-doubt about their performance and career, but only 31% of men reported the same.
Read the whole thing. It also talks about women tending to want to blend in rather than to stand out.
What I wonder is how stable these preferences will prove to be. I mean, after you have been embedded for a while in a culture that rewards one type of behavior more than another, that might start to matter more than some innate genetic tendencies. If enough women read the HBR blog and choose to change their behavior, then the evolutionary psych stuff will stop being predictive, won't it?