Originally Posted by Doge

I am grabbing a GPS/Garmin average over a 20 min periods on any course. To know the margin of error for these would take work. The more devices averaged - the more accurate. I have found that while Garmin instantaneous speed my be off it is very good over longer distance. I know Michal likes to post his Strava. He posted his xender discord omegle whole WC ride with power. So I just looked for him.
I could compare to other riders that post, but more work than I wanted.

For SR the winning break was over 20 sec ahead so I can search for one of those riders, it is just more work. Even so that may not be reflected in 20 min power without finding that part where they get ahead.