not necessarily
age doesnt slow down how fast you pull a trigger, till you're old and decrepit and have all the arthritis bending your fingers shut, and at that point, you're not going to be worried about shooting.
you can set up hosing stages that require a bunch of targets from just a few spots real close together so there isn't any advantage on someone who is younger and can run faster.
but hey, life isn't equal, our equipment isn't equal, vision isn't equal, but the targets and stages are the same for everyone, thats about as equal as you can get.
I wish i was taller, but thats not gonna change.
as for rifle matches and thinking distance, not with all the different disciplines out there. i hear pistol matches, i dont think bullseye.
and it's always fun to bring out the other toys that dont get used much.