I think they mean an overall metagame in USA, but that could very well include the metagame elsewhere if it's not groundbreaking different from USA... Meaning ppl only play decks from the past, or wierd constructions that's nobody really understands.
Some decks are played almost everywhere b/c they have reached a certain level of regocnition, like blaziken and team magma. Others again b/c they are so obvious, like Monarchy. Some decks remain untested if the local environment is isolated from say a board like this, so in such places the metagame cannot be be compared.
I think Norway, where we live Rubyloc, semi-resembles USA... We're maybe just a bit slower, but in time we do try out almost all the decks that americans label tier 1 (or tier 2). Just to give an example.... Right now there might be someone back 'ome building a Monarchy deck thinking they are up to date... Ouch...