To be honest OP I'm not surprised. With every game I've played that had the option of playing with the Japanese it's always been the same result. Polite Japanese, and mostly more vocal/haughty Westerners. I think it just all comes down to cultural differences.

But while they are polite they to can be xenophobic/racist not all of course but some. From my experience I believe both West and East house trouble makers. It is more prevalent in the West, but I don 't think there truly is a community that is a Utopia.