Not necessarily. Google may not comment on these things as a matter of policy; for example, let's say that Google is required by some law to censor a particular search result. If they are in the habit of announcing their censorship decisions, then their silence on that one site would be non-silence. They would have to lie about the site instead. So, from a company liability perspective, Google is cautious about revealing information.
That's true. But this isn't about Google releasing a whole class of information by policy. It's about them responding, or not, to a specific question of the form, "We run a legitimate website on the topic that the American government has censored more often, and more harshly, than any other topic. Could you please confirm that our recent drop in search rankings is not the result of deliberate action by Google employees?"
