First, accusing me of using PFF as gospel is a lie which i'm happy to reject. I do find it a useful tool, but I rely on my eyes and other available analysis. You can beat your horse and laugh all you want, but few really use PFF to support all of their arguments, ... it's a reliable service which offers an outline which doesn't discriminate by school, age, height/weight, past years performance, etc. It's only a guideline, no more, no less, and every team in the league uses it and knows what its positives and negatives are. It's no substitute for film, and no-one is suggesting it is. I have found it to be quite reasonable, and since I can't watch every single player and game the league offers each year, I read it knowing the shortcomings.
While you attack PFF for not praising the Rams OL, imagine if Gurley had been running behind those guys if they were all experienced fully developed vets, or been healthy for most of the season, … who knows what he might have accomplished. And if you track week to week, you can find inconsistencies in play, or how they all develop over time. If you watched Barnes this season, he got off to a very rough start and settled down and played better in the second half of the season, all that was reflected by PFF whether you like it or not.