Wikipedia has an article on a phenomenon I often observe on the Internet, such as on Hacker News: Americentrism.
Americentrism, also known as American-centrism or US-centrism, is a tendency to assume the culture of the United States is more important than those of other countries or to judge foreign cultures based on American cultural standards. It refers to the practice of viewing the world from an overly US-focused perspective, with an implied belief, either consciously or subconsciously, in the preeminence of American culture.
But even that word in itself, I think (as an European), contains U.S. bias: America is equated with the USA, but there are so many more countries in America.
Is it just me who thinks like that?