It sounds as if Micheals is being disengenuous, but this statement by Hansen is disingenuous as well. This period of most rapid melt also occurred when glacial ice was located as far south as the Washington DC region and is not applicable to the present day scenario where glacial ice is found only in Greenland and Antarctica. And rapid desalination of the North Atlantic from this melting of mid-latitude glaciers would have accelerated the warming/melting of glacial ice. Also not applicable to present day scenarios - but Hansen implies that the present day warming trend will similarily affect near-polar region glaciers.
In reading it closely, I think Hansen is aware of the difference. Note that he says "Given the present unusual global warming rate on an already warm planet..." That statement implicitly acknowledges that the termination of the last glacial occurred on a "colder" planet. I believe that the point of that section is that warming temperatures will likely result in increased ice melt (and he also notes his own research that the deposition of a small amount of black soot on ice increases the absorption of sunlight on the ice surface, contributing to an increased melting rate as well.)