I tried to download the chinese version (I wasnt on my vpn) and it set off LOADS of malware/spyware alarms, they monitor it. I guess for the U.S version, they obv modify it to be accepted with U.S agents so it wasnt set off when I dl'd the U.S version.
I sort of suspected it. If the chinese are monitoring what makes you think the U.S which has a waaaay more advanced web structure, isn't.
edit: that just gave me an idea. wonder what would happen if I dl'd a chinese virus protection program. bet it would flag loads of U.S govt spyware.