> The book goes through the studies that are touted as the most demonstrable difference in the sexes (tests on empathy)
Touted as such by whom? It sounds like just Baron-Cohen et al. Your comment gave the impression that "all" studies of gender differences have been refuted.
The most well-known, replicated, large effect study that I'm aware of I searched for and didn't find any reference to in her book. http://www.elainehatfield.com/79.pdf