Well, well. On this issue AA and I actually agree, and I disagree with THH (which I rarely do). The IPCC's estimate of CO2 forcing (delta T per C02 doubling), which has been estimated at 4 degrees, is almost certainly wrong, and most likely by more than double. Also, Nic Lewis' conclusions are far more convincing than the IPCC "consensus" statement, in my opinion. There's good evidence for CO2 forcing at 1.6 to 1.8, and I can provide detailed citations supporting this conclusion, as well as the gross errors promoted by the IPCC. But this is a blog about Rossi, so I digress.
Having followed the IPCC for 20 years with several neighbor/scientist/friends who work for NOAA and NCAR, and as a published analytical scientist myself, it is my conclusion that the IPCC's horribly flawed and highly political conclusions are a text book case of an abominable abuse of so-called science. (Which has some sliver of relevance to the Rossi discussion, perhaps).
I'd love to follow this up: but absolutely must not on this thread!