Still geared towards Americans, thus making it an American server. And the majority of players are from America. Just because there's many different cultures here, doesn't mean that it's NOT an American server. Your logic works the same way, the other way around as well.
It was originally a server geared towards Americans, and was run by an American. However, the cultures within the server were from all over the world. In addition, still had a majority of American players. The only thing that's ever changed, was the country of the server owner.
If WoE times and other events changed for international servers, then that'd make it more of an "international" server. But all live events and WoE etc... seems to be all US based thus, makes it more of an American server yes?