Hey there. I figure I’m intermediate at this point by RC standards. It depends on the song, for sure. If they’re easily within my reach (level 1 or 2), I can get them playable within a week of solid practicing, but I’m highly prone to the occasional error at that point, and don’t have any or many subtleties like dynamics. The harder it is, and the cleaner and fancier I want to play it, the longer it takes.
It used to take me the full month of the challenge to get anything remotely recordable. Now I usually post part way through the month, but it would be better if I would take another week or two to make it cleaner before posting. I get excited about sharing too early. 🙂
TL/DR: It depends, but it gets faster in time.