Do you not have the background downloader working? Anytime you exit WoW it searches for upcomming patches and downloads them for you before you sign on, when you log in again it pauses then continues again when you exit. After it is done when it is patch time you wiz through it, seriously I had 1.2GB done in about 5 minutes.
Apparently I don't then, when I attempted to run it earlier, it said "Data for next patch is not available." so I'm not sure what the hell is up with that.
::EDIT:: FUCKIN SHIT! Now the bitcomet file just restarted for no FUCKING reason. Damn I'm getting so fuckin' pissed off.
And of course the Blizzard website isn't even updated with the latest patch download.