Some of the very well-known and respected, active community contributors are women, and apparently the Drupal community is generally less gender-unbalanced than other open source projects - women made up a whopping 10% of the most recent DrupalCon. One participant says "Drupal has always had a larger number of female contributors than most open source projects, the percentage just a piddly 2% in open source in general. We've been at 7% for a while now and it's so great to see those numbers increasing."