The data does show that women led companies do better- but the fact that there are so few women who have to fight to make it to the top could mean that the women who get there are better- not that women in general do better.
Studies could also show that there is a higher chance for mothers to quit along half the way due to child-related reasons (made up studies for the sake of argument). That on the other hand would be considered misogny. And I'd take it with a grain of salt as the sample sizes are vastly different.
That being said, do you have a link somewhere? Would really be interested to read that.