Looking at this graph, I wonder why people weren't suspicious before. The 'little ice age' is a matter of historical record. It shows up clearly in the corrected plot. It's nnowhere to be seen in the Mann plot.
Hey, little things like "experimental data" mean nothing to the eco-"computer modellers". Far be it from them to let "historical fact" stand in the way of a good theory/model.
I don't follow you here. The little ice age is taken to be between about 1300 and 1800 (depending on when you count it). In the "corrected" plot they are showing temperatures higher then now during the little ice age!!!