The US is also slightly bigger and has just a few more people than Japan, so i'm not sure that's really accurate. regardless, that's a respectable amount of sales for a game we weren't even sure we would see in America.
Pandora's Tower arrived in the mail today. It's definitely the darkest game of the three, I'd say you guys will get it eventually, after all you guys smashed Xenoblades sales, over 140,000 copies on launch week, which is another 30,000 more copies more than EU and Japan combined, JRPG's on the Wii at least seem to be more in demand in the US than Japan itself .
Although JRPGs fans are practically a niche audience here, while over there everyone plays them.