A very nice piece by Dr. M.H.P.Ambaum appears in Skeptical Science. It explains tersely why the whole approach to climate statistics (detection/attribution) of the naysayer squad is wrongheaded, but the reader needs a little familiarity with statistical thinking. (I wonder if J. Curry can make heads or tales of it).
This ties into my generic dislike of what I would call empiricism in climate science. Actually, of course, without empirical evidence you are not doing science, but rather pure math. (or else economics!) The trouble comes when the empiricism is combined with a hypothesis that climate is stationary, which is implicit in how many of their analyses work. It's essentially begging the question. More to follow.