That does relate as well, even though I wasn't specifically referring to that. So, yes, I suppose you could say that Asians (because it's a similar tendency across Asian countries) would tend more towards the S type. As with anything statistical, it can only be applied generally and has no meaning to the individual (except to say; because of X my odds of being impacted by Y is Z%).

As for nature vs nurture, the only solution is a weighting of both.