You know that DuckDuckGo is a US company, right? And thus subject to the same exact laws as a company like Google (and the same NSA snooping). It's true that they don't log your search queries, but if the NSA has access to the root CAs they can snoop on you anyway. And what do you think happens if the government subpoenas DuckDuckGo and tells them to log your traffic? They will of course do so. And they have a MUCH smaller legal budget with which to fight such government requests than, say, Google.

DuckDuckGo is a cool company, and I think they have a neat product. But if you're worried about the NSA, then you're kidding yourself if you think DDG is safer than any other search engine. Just use Tor and be done with it.