Quetzal writes:
A mere 13,000 years (well, even if we postulate the 25,000 years some authors argue) simply isn't enough time for human-derived selection pressures to have caused this kind of adaptation
That's kinda debatable. For example, the samurai crab off the coast of Japan.
In only a few thousand years, the Japanese fishermen unknowingly created this crab with a samurai face.