I'm not sure about the "off the boil" advice for temperature. I read in Cooks Illustrated recently that boiling temperature water makes coffee taste bitter and that it's best to use water between 190F - 205F. I tried this recently, with my usual pour over cone, and found that 190F water made the coffee delicious!
by the time you pour the water and it hits/heats the room temperature grounds the water is going to drop several degrees, I could go test it but I suspect >90% of the brewing is at <205F.
EDIT: for example when brewing beer my friends and I tend to add the grains when the water is about 10 degrees hotter than we want to mash at.
