Look at the scales on that chart. It starts at millions of years before present, then drops to thousands of years before present, and then our last 200 years is basically a vertical line at the very end of the graph.
Yes, really "NumberCruncher". Which period on that chart do you think shows a more rapid change?
There are several periods in the Pleistocene that see dramatic rises. The graph itself, with it's logarithmic scale on the X axis, does not make it at all clear. Also, the methods used to determine the average temperature are necessarily going to be different for the Pleistocene than now. That makes it inherently hard to make useful comparisons.
What's your point? If you're posting a graph as confusing as this one (4 completely different x scales) at least tell us your interpretation.