The article ends by admitting the possible influence of testosterone on behavior, which could actually mean that Ben's performance was significantly different than Barbara's. For what its worth, there's a reason folks change gender, and it involves behavior and biology. If they didn't change, there'd be no point to it. Behavior and biology are very significant factors in how you appear and are perceived.

So we can say 'of course its gender bias' but how is that actionable without knowing what part of that bias is due to what? Is it behavior, culture, aggressiveness, what?