In fact, no country allows unrestricted flow on the Internet of pornographic, violent, gambling or superstitious content, or content on government subversion, ethnic separatism, religious extremism, racialism, terrorism and anti-foreign feelings.
Not true, the US allows all this, with very minor exceptions.
http://en.wikipedia.org/wiki/Online_gambling
So are certain types of porn and anti-government websites.
But all types of porn except child porn are allowed as far as I know. Definitely all types of anti-government websites are allowed. The first amendment confers very strong protection on free speech.
This Chinese news release is trying to mislead. I think the average Chinese citizen would be shocked to learn the level of freedom of expression and access to information in the US.
(Apparently, the state of Kentucky has recently tried to seize gambling-related domain names held by remote entities, but that's a new local enforcement tactic which may not endure.)