I think I would agree with the Sub 56 min 50k and Sub 19 minute 1500m swim. Consideraly above average, but by no means great
For adult swimmers, going 18:59 is nothing special. Hell, going 18:00 is nothing special. Since I’m not a runner though, it’s hard to tell if 16:00 for a 5k is anything special. To get an idea of what I mean, the time standard for a 1500 for Ontario junior provincial champs for 14-year-olds is 18:15. 19 minutes isn’t even above average for 14-year-olds, though it may be for triathletes.
Another way to look at it: Canada’s national qualifying standard for a track 5k is 14:25. The short-course 1500 national standard is 16:06. Keeping the ratios the same, that gives 17:52 for an equivalent 1500, which is about what the world-record calculation gave us.
So if these calculations are correct, would I be accurate in saying a 16:00 5k runner isn’t anything too special? They might final (but not win) at fairly big (interregional or province) events, but aren’t hauling home truckloads of medals.
I think you’re on the right track. For the masses, a 16 min 5k and a 18 min 1500 aren’t just great, they’re unattainable. For serious competitive athletes, a 16 min 5k is an also ran (for men). In High School, the 5k isn’t run often on the track, but the equivalent 2 mile time would probably make the finals in most states. At a regional level, it would be nothing special.
I was coming up with my marks based on the masses, not on the single sporters. I would wager a roughly equivalent number of athletes could swim sub 19, bike sub 56, and run sub 16.