Within my riding group, we have all sorts. The coach is old, waify, superfit. On the Computrainer last night, 1 hr 10 min for the course I did last week at 1 hr 15. The uber clyde of the group, 1:01. Waify racer female late 50s. 1:08.
Different is all relative. I like what Mike above said. And It's okay to revel a little in the fact that yes, you could smoke them.