You are correct on the Asian realms.
One advantage the Asian realms have is that their entire realm list is separate for each region. For example Korea has its own servers and China has its own servers, meaning there is no culture/language conflict. The problem with EU/US realms is that language is segregated by individual server only, and then a lot of people tend to play on high-pop servers anyway without regard to language difference, and try to make their own language communities within that server.