Yep, agreed. I don't see anyone expecting anything more from QB here on the speed of the development path. Malkin didn't come to the NHL until he was 20. He has a similar late birthday like QB and drafted at 17. Even then, Malkin was/is exceptional. HOF numbers right off the bat in the NHL. Jumbo also a later birthday in July and Boston immediately put him on the big club. At 19 years old he was .5 PPG, at 20 it was .75 PPG, at 21 1PPG. Kopitar also 17 on draft night, spent a season marinating in the SEL before coming over. All big centers who were younger than most of their draft class. Nobody expected them to be stars at 19. At 20 is when you can expect to see real impact. At least 5 years for QB? I would expect he's going to be impactful before he's 22 years old unless you're expecting 100 point seasons out of him, which is a tall order for any drafted prospect.
Edit: And holy crap some of you are DRASTICALLY exaggerating QB's current level of development. He's not a project, people.