Yes!
Although, truthfully, it's been better the past month, but in August Macupdate was unusable, totally fubar'd. Glad to have someone else in here confirm it's China, not me.
I do want to say it's better recently, though I did get it once yesterday. I also get timeout errors, or just plain denied connections, a lot in Firefox on a PC at work too, so...
China sucks at internet. (Waiting to see if this gets posted).
It's not that bad, their connection to the outside world is just suspect.