Recovery keeps its own clock and rarely consults yours. A lawn after a drought doesn't come back as a green sheet; it comes back in patches, one corner first, the bare strip by the path last of all.
Speed gets discussed as though it were a single number. It isn't. Some parts of you will be further along than others, and the lagging part gets all of the attention.
Rapid, when it arrives, tends to be noticed backwards — a Thursday when you realise something that was hard in spring is no longer worth mentioning.