I'm 57 and notice no difference at all in recovery times after rides, compared to my 20's. Maybe less time now because I'm smarter about post-ride eating, rest, and re-hydration.

I have not actually timed myself, but I still feel every bit as fast as I did 30 years ago. The differences are shockingly minimal to non-existent. I used to think 57 was old, but no more. Though I should probably time myself just to confirm it.