LOL, Americans...
So a site is hosted/run from the US, but I doubt more than half the visitors (audience) is American.
As for it not "just working" in the us being that important, Ubuntu is controlled in England and run with African ethics, good luck getting your oh-so-important US problems involved.
I'm also pretty sure that while the US does represent a rather large number of Ubuntu users, China, Africa and Europe represent even more.