What PFF or anyone else can't quantify is the reaction the team has to Dak and his leadership.
While it would be crazy to expect a rookie QB to not have fumbles and INT's, you can call it bad and downgrade his performance if you wish. But the entire team plays hard for, and responds to Dak like very few QB's ever achieve. The run game, the OL, the defense... they all play better and with more confidence when Prescott is in the game.
They did it at his HS... they did it it MS State... and they're doing it in Dallas. You can't put a number on that and frankly, that is a big reason why the team can have mistakes and still cruise to an easy victory at Lambeau field.
It is the chemistry. The belief. The trust. The togetherness that Prescott fosters when he's leading a team.
Laugh at this if you wish... but I'm telling you, it is real and PFF can't do anything to grade that.