Yes, in fact. I have people in my extended family who are fair skinned (i.e. white) and have visited my home. The Nest was almost immediately able to accurately identity them even in sub-optimal lighting conditions. Even though it struggles to identity me except in the most optimal lighting conditions. Despite the fact that it "sees" me a lot more.

It was one of the first things I noticed when I got the doorbell. The difference was stark and obvious.