Brock I don't know for sure, but I think the time to replace org is variable. It seems to me my units reconstruct a lot slower in regions of low infrastructure, and quicker in home provinces. Weather also might have a lot to do with this.
In general, I agree with what has been said here about insta-force. But the org hit is significant. Units that are low in org are just not effective. I still think a lot of the super accomplishements need to be fixed via supply. It is just too damned easy, for example, to supply Italians in North Africa. With a supply stockpile clear back in Sirte, 2 Inf XX's can march all the way to Alexandria.....no problemo. Supply should attrit away, and have dimenishing effects the further it has to travel to get to the unit being supplied. Modified, of course, by the infrastructure (road-rail net) in the province. Of course, Italy in this case could always ship to Bardia, but then risk more convoy interdiction due to the proximity of the British fleet.........if that is taken into account.....I don't even know for sure if it is, but it should be.