@1
"What is the average Chess.com rating where players tend to reach master level?"
++ For 2200 FIDE = CM you need at least 2300 rapid online
"online and over-the-board (OTB) chess completely separate entities?"
++ Yes. There is more psychology over the board: you can see your opponent, how he looks, moves, sweats, ... Over the board classical say 90|30 is also different from online rapid 15|10 or even faster: it requires stamina to stay concentrated for hours and cheap tricks do not work.
I've been playing chess on and off for 5-6 years. Recently, I broke 2200 in rapid, but I find myself stuck at 1800 FIDE with NM nowhere in sight. I'm not surprised, but it's still a little depressing considering how distant a title seems. I'm doubting whether I'll reach it even if I play the rest of my life (currently 21).
What is the average Chess.com rating where players tend to reach master level? Or, are online and over-the-board (OTB) chess completely separate entities?