EEDAR's VP of Analyst Services, Jesse Divinch, called the difference "insignificant", and noted that in many games, it would be impossible for a female lead to be in the game, such as EA Sports's titles, as well as games like Call of Duty, which have realistic takes on war in where a woman is barred from the front lines.
The study comes on the heels of leaked reports that Activision disallowed female leads because of perception that sales for those games were poor. However, it should be noted that Activision couldn't care less about review scores. If a game gets a 0 Metacritic score and makes a heavy profit, Activision's all over it.
Nonetheless, look for more games with female leads as executives believe there's a correlation. What is more worrying for me is the fact that 910 video games came up with an "average" review score of 65.18 out of 100.