I read somewhere that people in Asia won't tilt on things like eye or hair colour being different immediately since their so used to black hair/brown eyes that they just filter it out and use other cues.
This also means that people who look identical to say a European are considered to look nothing alike.
Which is worse than useless since it renovated the impetus to do anything else.
It's like when you tell everyone your new years resolution and they all go "wow you're really courageous, well done on turning the new leaf". Your brain goes "ok, got my recompense for that, no need to put more effort in there" and bye bye resolution.