Despite all the nonsense, I like that this points out regional climate changes.
It will be interesting to see where Mann takes this. He has been criticized for getting the “shaft” of his hockey stick wrong (no pun intended). Part of that was discounting the Medieval Warming Period, but the scholarly research on the existence of that is tough to ignore (even though Mann et al did their best to discredit it).
My guess is, he’s scrambling for an explanation that will fix his shaft (again, no pun intended).
Wonder if he’ll proactively release ALL data and code used to arrive at his conclusions...? If not, he’s learned nothing from ClimateGate about doing science.