Biracial America as Understood Abroad

I'd love to know more about how biracial people fare abroad.  Like the author of this article from a U.K. Guardian blogger, it seems that non-American black biracial people have a very different notion of what it means to be biracial.  Do they not have to "choose to choose" as we do (at least have had to) in America?  I grew up in large part overseas until I was eleven.  I have always ascribed the "racelessness" I felt before moving to the Pacific Northwest to being a kid.  But my "racelessness" was also due to the fact that I didn't live in America.  What do you think?