Actully thereason is their atmosphere and mainly they are born and bought within their family.they are giving advice and ideas and what they needed whilw they studying.it will form in their character.so asia girl become smart
they are? i didn't know that. well i know in most japanese anime girls are often portrayed with hyperactive personalities. even the ones that are shy or serious tend to be a bit hyper when it comes to showing emotion. maybe asian girls do it in real life to emulate the stereotype of what their media feeds them. not too dissimilar to how girls in the usa dress premiscouisly to emulate the models they see on tv. of course i could be wrong, but it's just a theory.
by the way, im half chinese, so if anyone here says im a racist for saying that, im not. get over it. its just an opinion.