It's not a US server, it's a North American server, it just has a .us domain name. Originally it was actually a North American and Australian server, but they later split the Australians into their own domain. However, a strong Australian presence has remained in part because North Americans and Australians make excellent dual teams. Since the person you replied to has his location clearly listed as Australia, your post was completely inept.
You said I failed at understanding international spelling? It's a us server for a reason dude