I've heard before that relatively lower-rated (not actually low-rated, but the equivalent of top-tier modern female players) tend to play more agressively than do those at the top of the rating charts. Admittedly, I have no data to back that up, but that's no less evidence than most everyone else has presented.
Could the aggression of top female players be a product of their lower total skill levels? Their aggression should be compared to that of male players of similar strength rather than the top males.
I've never played against a women before and that is not because I don't want to, it's just that I have an instinctive fear of divorce lawyers.
"Don't be afraid of us!" said I as an MA in Law, although not a divorce one