To tell the truth I'm kind of surprised this happened so quickly -- apparently The9, who runs World of Warcraft in China, were able to drop the Sunwell Plateau patch pretty soon after it came out in the US and Europe. Burning Crusade, we know, took a long time to release over there (it came out months after it did on this side of the world), but either The9 is responding to pressure to release content closer, or patch updates are much easier to localize and distribute.
Either way, grats to The Seven and all of the other guilds worldwide able to topple The Deceiver. Next up, Northrend!
Update: Our commenters remembered something I forgot: All of the Sunwell Plateau gates were released open in China, to make up for the late content releases in the past.