Most climatologists (sans Phil Jones and some of his CRU associates?) agree that global warming is happening, and that it is probably man-made. The trends of global warming do display a notable correlation with the amount of solar radiation and its band (spectral) distribution[1]. Thus, the latter conclusion about man playing a significant role in making, or ever having made matters worse is not fully validated.

The thing is, none of that really matters. Since no climatic model can currently represent all of the relevant variables, the only responsible thing to do is to take action against global warming. If we end up taking action in vain, another global depression may ensue. If we don't take action yet (man-made) global warming becomes unstoppable, Earth may become the next Venus.

On a related note, I wonder how far-reaching the consequences of the CRU leak will become. After all, it is becoming increasingly apparent that a small cabal of climatologists have sought to control the overall agenda to increase and gain funding beyond that which could have been previously expected:

http://www.aei.org/article/101395