Originally Posted by
noglider
I realize that comparing my power output with yours is not useful, but is it good enough to compare my output from today with that of yesterday?
how would they know you didn't have a massive tailwind, or more likely, a massive headwind? It's not that easy to do this calculation. Even taking wind into account, they don't know if you are wearing baggy clothes, if you pumped up your tires, or anything like that.