Geez guys....he admits it's a statistical ranking...and he further admits regarding Flacco:

Flacco has played better on Game Rewind than the metrics show.
Flacco's numbers are not great because in 2 of the 3 games (CLE and HOU) he's gone up against some pretty tough defenses, so he was careful with the ball and, when the Ravens got the lead in the latter part of the game, they took the air out of the ball.

In the third game he had Rick Wagner as his RT for most of the game, a defense that could pin its ears back, and a bunch of receivers dropping balls all over the field.

I have no problem with the ranking and I have no problem with the way Flacco has played so far.