Dan,
It's one my hillbilly ways of saying what I mean. A2 is, as you probably know, an air hardening steel as opposed to oil hardening. By far, most simple steels we knife makers forge and heat treat are oil hardening. To work 1084 (oil hardening steel), for instance, we would forge, normalize, and in most cases, edge harden in oil. With A2 you , more or less, anneal the whole blade, then heat the edge only and let air cool. Some place the annealed blade in oil, with only the cutting edge expose, heat the edge with a torch and let it air cool.
It's the way I picture it in my mind. With 1084, the blade is out of the oil with the edge in and with A2 the blade is in the oil with the edge out. Think backwards. See? I told you it was hillbilly.