Still impossible. Not even taking into account anyone's natural abilities, do you spend the hour practicing scales? Learning songs? Learning new scales/modes? Theory? Writing? What do you consider a learned scale? When you can play it faultlessly ad 80bpm? 120 bpm? How would you compare someone who focused on theory, could fluently read music, and knew every scale and every mode but didn't know many songs vs. someone who simply got fluent in pentatonics and can play a bunch of songs?

I feel your pain, and I have asked the same type of question myself. Without peers to directly compare with, who are starting at the same point and taking the exact same curriculum, it's very difficult to say what any person should know after a period of time compared to another person.

Music is a journey. There may be milestones along the way, but it (IMHO) should be more about drinking in the scenery than reaching a destination.

:)