At very least Twitter and Apple have a decent track record of declining to provide data without justification. It seems pretty safe to assume the Chinese government wouldn't have to ask at all to get any of this information.
That's not "the standard", it's just worth mentioning that at least some companies have a proper legal team that seems to work on behalf of its users. Twitter's actually been behind a number of legal precedents on the right to be anonymous online.
I also don't speak for HN, clearly, since this post is full up on people who see no difference between "almost definitely has given full access to the government 24/7/365" and "Complies with reasonable court orders".
