What we are seeing, albeit with a small sample, is what happens when a nice college player is allowed the time to sit behind a very good starting QB, in a good, settled system, with good coaching, and learn - day-by-day-by-day. Not being rushed into the fray to "save the franchise " but allowed to assimilate into the pro game.
We are also seeing a very mature young man who from his high school days was willing to go through the drudgery of working on his fundamentals. Footwork. Release point. Hip and shoulder angle. Finger position. ...all that stuff. Even after he "hit the big-time" at New England behind Brady, he did his homework. He studied. He learned.
Aaron Rodgers did the same thing in Green Bay.
It is a formula that works. Now SF gets to reap the fruit of seeing what a finished product really looks like.
I won't mention how it is too bad we screwed up the previous two guys that came in here and had none of that. Oh, wait. I already did. NVM