There exists a third possible answer: We don't know yet.
I don't know if I'm just pissed off today because of the whole CT thing, or because I see more and more mass media outlets posting nonsense about science, but if you have to ask "did xyz discover blah blah blah" the answer is probably no. It's misleading, and poor form to say stuff like that.
Does posting on HN cause BRAIN CANCER?!?!?!? What you don't know about posting on the internet could kill you and your family, twice.....more after a new episode of Modern Family! [/end anger]