If it wasn't for the language barrier, we would see many more US/Euro players going to Asian games to play "the real wow" and get "the real gear".
The only thing that's sad in this thread is the implied racism ("Asians are better at video games!"). That's a lot like saying "Americans are better at football" (referring to American football). That's actually true, of course- but it should be obvious as to why- Americans love that sport and there's way more of them playing it way more often. Koreans kicking ass at Starcraft isn't some strange national magic and CERTAINLY not some strange "racial trickery of the yellow man"- it's just that their culture loves and appreciates that skillset, nothing more.
If Asians had some strange leg up on WoW, we'd have seen the Asian guilds all over these sites before, and not merely in proportion to their numbers. The reason Asian guilds are dominating is because they have access to far superior gear compared to US/Euro guilds, nothing more.
So yea, WoL should list them separately. It's a different game with disjoint gear sets.