Second, how did they determine pseudonyms as "male" or "female" sounding? If you want to study unconscious bias, you'd need to know whether the things that supposedly trigger it actually do so.
Furthermore, did they account for their own unconscious bias? I can imagine, using the same unconscious bias theory, that they sent self-assessed lower quality patches with "female" pseudonyms unconsciously, to prove their theory correct.
Lastly, the 100% is very close to unbelievable, having an implicit assertion that identity politics are the primary driver of motivation in the developer team, way above any coding merit. To me, this is more likely to be projection from an identity politics activist(for whom, by definition, identity politics are the primary driver).