Agreed - perhaps he could have used more explicit language but, as you rightly said, I think he had answered that question already. I know he's public enemy #1 amongst some SEOs but people should stop being so rude to the guy!
I don't know if your comment is directed at me, but I don't feel I was rude to him at all. I do see a lot of hate for Cutts from SEOs, but they hate Google anyway. Cutts is just a face to Google that they can focus on.
But that is not saying the same thing. Your interpretation of it is "Yes. I am saying that +1s make no difference in Google rankings." but that is not what cutts said. His answer leaves it up to your interpretation. He could be saying "people who say +1s have an effect have no way of knowing that for sure" because we don't have access to their algorithms.