At least according to John Collins Rudolf at the New York Times Green Blog. Mr Rudolf seeks to defend the Hockey Stick, a reconstruction of Northern Hemisphere temperatures, by reference to a handful of local and regional proxies. This doesn't strike me as very clever.
I tried to post a comment at the NYT. I said that the NRC defence of the hockey stick - that Mann used a biased methodology and inappropriate data but had still reached the right answer - was an embarrassment to science.
They have not allowed it to be posted.