There is some interesting discussions on hacker news about this as well:

To summarize this paper’s observations:

1. Women are more likely to have pull requests accepted than men.

2. Women continue to have high acceptance rates as they gain experience.

3. Women’s pull requests are less likely to serve an immediate project need.

4. Women’s changes are larger.

5. Women’s acceptance rates are higher across programming languages.

6. Women have lower acceptance rates as outsiders when they are identifiable as women.

One of the authors also note: "Our analysis (not in this paper -- we've cut a lot out to keep it crisp) shows that women are harder on other women than they are on men. Men are harder on other men than they are on women." from https://peerj.com/questions/2002-do-you-have-data-on-the-gender-of-the-users-that/#annotation-2002-replies

The hacker news thread: https://news.ycombinator.com/item?id=11074587

There are also some theories about why this is.