Let me bring a baseball analogy to this. Japan/Korea are producing very fast pitchers these days. When they imported baseball to their countries in the 50s they were mostly non meat eating (i would like to point out i am not saying they did not eat fish). Now meat (beef, pork that they imported along with baseball) is a staple of their diet. And in the 50s they could never throw 90 mph. Now they throw 100 mph pitches.
