This came trhough my twitter feed rewteeted by Tania Ganuli originally from 18to88 and I thought it was pretty fascinating. The writer did a study comparing quarterbacks statistics when they changed teams to see what remained consistent. Sack rate was one thing that stood out.
While sacks can be the fault of the offensive line or the accomplishment of the defensive player, the evidence is pretty clear that the quarterback is at least as responsible for his team's sack rate as other passing performance measures that we readily attribute primarily to the quarterback. It's time that the NFL passer rating reflect as much. I suppose the argument against change would be that the passer rating is only measuring quarterbacks as passers, and a sack isn't a pass. This, to me, makes about as much sense as having a hitter rating in baseball that ignores walks and called third strikes, because, well, the guy wasn't swinging at the ball.