I disagree with them and do not feel that the o-line has been blocking well in the second half of the season. I don't think DD is going to be the answer to our needs in the long run. Of course if he wants to bust loose for 1,500 yards next year to prove me wrong I'm not going to have a problem with that. I don't think it's likely to happen though.
This year the running game became a problem due to a convergence of reasons. Davis got off to a bad start against San Diego and Detroit with four fumbles and that set him back, the new blocking scheme and addition of new starters, Wade missing time in the middle of the year and the poor play of his backup, Carr calling what can only be described as absolutely stupid audibles at bad situations, and the move of Chester Pitts to guard for the first time all contributed to the running game being sub-par.
Saying DD is the sole reason the running game sucks is like saying that Palmer is the sole reason that the offense sucks. He's a part of it and should get his share of the blame but he's not the only problem there.