I also like Norv. He's done a good job, maybe not great but definately good. I don't blame the teams lack of physical toughness on Norv. Remember those Dallas teams ran the ball very physically. I think the problem is that LT can no longer make the first tackler miss and he was never a physical runner that could run over people.
I get tired of hearing about how great Marty Shottenheimer was. His teams were also slow starters every year and he always played big games not to lose instead of to win. Before his last year in SD everyone wanted him gone except Spanos. One good year didn't change what I thought of Marty as a coach. Plus you don't see anybody else lining up to hire him, that should tell you something.