Right, but it's still good news, as it pushes the conversation from discussing whether or not AI is dangerous to discussing precisely the best organization to prevent unsafe AI. Right now, a report by MIRI on the specifics of MIRI vs DeepMind/Vicarious, if it magically came across Musk's desk, would have a chance of doing good. Before, it wouldn't. That's progress.
http://www.businessinsider.com/musk-on-artificial-intelligence-2014-6
Summary: The only non-Tesla/SpaceX/SolarCity companies that Musk is invested in are DeepMind and Vicarious, due to vague feelings of wanting AI to not unintentionally go Terminator. The best part of the article is the end, where he acknowledges that Mars isn't a get-out-of-jail-free card any more: "KE: Or escape to mars if there is no other option. MUSK: The A.I. will chase us there pretty quickly." Thinking of SpaceX not as a childhood dream, but as one specific arms supplier in the war against existential risks, puts things into perspective for him.