You have to sort of narrow down 'today', though - in europe, you can argue US influence was a source of peace in the post-war era. In east asia, the post-war era was actually extremely bloody.

I think the one thing east asian states tend to have in spades is pragmatism. The US, on the other hand, is very often engaging in the region for ideological reasons. For that reason, it has tended to engage in bloody, somewhat pointless wars that have often span out into civil wars in neighboring states (Cambodia, for example) or produced traumatized, basketcase states (North Korea, for example, or pre-revolution South Korea).