This one may tell a story.
As ancient_gezzer pointed out in post 43 the 8kyr graph shows a down trend. I add that the recent 2,000 years even more so of a down trend. Looking at Figure 1-3 (the 12,000 year graph) and Figure 1-2 (2,400 years) it appears Earth is set to plunge on a down-spike of the cycle. From the year "0" looking right, the upper spikes are lower highs and the lower spikes are lower lows.
My point being, it looks like it should have already happened based on the historical data in Figure 1-5. The moderate temperatures we currently enjoy appear to have been around a lot longer than they were during previous spikes. If figure 1-5 is to be believed, and given our present gaggle within the "scientific community"; flip a coin, the graph indicates some anomolous behaviour beginning at 75,000 - 80,000 years ago. About the time Toba exploded???
It would appear to the untrained eye, like mine, the temperature sampling becomes more frequent within the last 80,000 years or so, and even moreso during the last few thousand years. Is it a trick of the graph creator to make things appear worse than they actually are? Or is there cause for concern because we've been "stuck" at the current peak for far too long? Lacking more information regarding sampling rates and how they were applied to the graph, I submit we can't really tell.
FGS