Not so fast (Score 1)

See http://courses.lib.odu.edu/engl/jbing/brain6.html for an excellent critique of "Brain Sex." Pay particular attention to the points about how one experiment that shows a small difference will get a ton of attention, while fifty other experiments that show no difference will be ignored. Also note the point that any experiment run to find differences between two groups (tall people vs. short people, blue eyed people vs. brown eyed people, etc) will likely turn up *some* difference, but that difference won't necessarily be statistically significant.