As long as we ask gender-related questions, we'll find gender-related answers. Especially noteworthy:
> Perhaps only a few highly successful and prolific women, responsible for a substantial part of overall success, are skewing the results. To test this, ...
In other words, the researcher started with the hypothesis that women were discriminated against (as they say in the first part), then was surprised by the result and tried some more. Maybe, from time to time, it would be great to stop spurring the hate against the other gender: 1. Make sure everyone has access, 2. Analyze by some other criteria – It's not because gender is a readily available variable that studies should use it as something significant. Maybe shyness and marital status is more important, who knows.
Apart from not liking the idea of trying to find all little differences based on gender, the rest of the paper is interesting and in series of "Maybe women are X and Y? Here's how we'll check, here is the conclusion."
Last point, an equalitarist researcher would have studied the hypothesis "Is it possible that maintainers are simply kinder to women?". A lot of societal behavior could be explained this way, yet it's never a variable of those studies.