We're going to take out a "license to kill" this particular skeptic meme.
Specifically, Bond et al 1997 titled Okay, this Bond doesn't quite have Ian Fleming's knack for a catchy titles but we'll work with it.
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This is often referred to as a "bipolar seesaw." Bond et al takes a look at the Holocene and identifies a similar, but lesser, bipolar seesaw effect at work.
The work is primarily done by looking at ice-rafted debris (IRD) in sea bottom cores around the North Atlantic.
That is, offsetting warming and cooling between the Arctic and Antarctic.
This is not the planet heating up suddenly and then cooling off.
They are easily recognizable in the GISP2 core by rapid warming followed by slower cooling, following an aproximately 1470 year cycle.
D-O events are also notable in the climate record as being a redistribution within the climate system because they are also found in Antarctic cores with a corresponding but reverse signal (called an "antiphase").