Abcs and 123s

My sons pre school teachers told me he’s the smartest one in the class. They were kind of shocked by it once they realized it but they couldn’t get over that he can recognize the entire alphabet and count to 20, knows all his colors, recognizes approx 40 animals and knows like 400 words (he just started talking in July so this shocked me too to be honest).

I’m curious how many kiddos know their alphabet, can count and recognize so many objects?