Designed to Deceive: Do These People Look Real to You?

How? The generated faces have too perfect teetch, sometimes illogical changes in skin texture and hairiness,... But one thing really stands out on its own and I think I could be just as correct if I only relied on it.

See how all these pictures are propely lit and exposed and seem like they were taken with a decent camera? Now notice how this isn't the case with hair, especially transparent parts of loose long hair, where you see individual hairs. These parts look like they have way more noise and like they've been taken in low light with high ISO, somewhat like in a bad HDR composite. This may not work for slicked hair or bald people, yet it's pretty evident in almost all other cases.