gjm comments on Argument Screens Off Authority - Less Wrong
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That is not the impression I remember getting, but since I don't even remember where I saw this you shouldn't trust my memory much.
Here is an IPCC report from 20 years ago. (Warning: large PDF file.) It predicted a 2 degC rise, relative to a baseline in 1990, by 2100.
The report mentions that its predecessor in 1990 gave a more pessimistic best estimate. Here is that report. (Warning: large PDF file.) Its best estimate (with much uncertainty stated) was about 0.3 degC per decade "during the next century"; according to that estimate, 2 degC of warming would take about 70 years.
So, please, whose alarmist position was that there would be 2degC of rise in the next 20 years, and why should we care?
(Thanks for the ~20 downvotes, by the way. You're a real pleasure to talk to.)