4C or 9C depends on the source and time, the point though is that the change from ice age to our previous climate took 10,000 years in that chart.
Our 1C in 100 years is dramatically faster, whether it was 4C or 9C it's still a rate of change that is magnitudes faster and nothing like the natural changes of the transitions through the ice age cycles. I've always said rate of change is important at least now it's you / jopo that has posted some evidence to show the difference.
