Originally Posted by
ThermionicScott
Are there? As in, people who have said this to you? Sounds more like one of your strawmen to me.
Definitely a strawman, but that isn't to say some of us don't use that metric as a fun goal to achieve. I did it in June after a couple of prior attempts, next milestone is 4:45. But yeah, there isn't this secret society of "serious cyclists" saying that a sub 5 century is the key to entry.