Originally Posted by
Mr IGH
This is your screen for newbie rider ability/skill level, someone without discs is a good rider and someone with them is bad?
No there are lots of screens, little tells like ripped shorts, poorly maintained equipment etc.
Whenever you ride with or race against people you don't know, it pays to size them up.
Given that 1) disc brakes, at least around here are showing up disproportionantly on the bikes of newer riders, and 2) misused they can cause more havoc in a paceline, it's another data point to take into account, and be aware of.
Sizing up the people you're riding with, knowing their quirks and tendencies will go a long way in staying out of crashes. This is just another piece of the puzzle.