I have no problem with someone being faster than me, at all. I have no problem with a younger guy burning up my route. The younger guys that run my route, do 1/2 stop an hour better than me. When I was younger I could tear it up too. I still can do more work in a day than most people ever do. UPS people not included. You get hired coz you are an animal, you are fast, us older guys have to remember that.
No one is going to listen to the preserve your body crap, I didnt either when I was taking 2 stairs at a time, and never using a dolly, and jumping off docks, jumping out out of the truck, like an Impala (deer) and beating myself to death, coz I was young and I recovered faster. Now not so much.
One place I did take my time though was the driving part, because you could change your life and someone elses in an instant, especially the way people drive now! I commend all of you younger guys for working hard, fast, and being impressive. Be proud of it. Just dont work off the clock, to do it, and preserve your body for your kids, and spouse, and yourself. Every week goes by fast before you know it, you are at the end.