No gender differences found in math performance. None. Not on average, at least in countries where the sexes are treated equally. And no, not at the highest, outlier levels of mathematical ability, either, despite what some believe. And not in number of undergrad math degrees earned. And not in terms of complex problem solving ability. Just plain not.
"Ben Barres's work is much better than his sister's," one scientist remarked to another. The only problem is that Ben Barres and his “sister” Barbara Barres were the same person. An FTM transsexual offers a unique view of the impact of gender discrimination in science, having seen it from both sides. Despite the fact that recent studies have shown that a woman has to be 2.5 times as productive to be judged as scientifically competant as a man in the sciences, many still argue that there is actually a level playing field, a source of some frustration for many women in the field. (For a somewhat easier to read and referenced response to the Physics Today letters, check out Evalyn Gates’ reply at the end.)