I thought Garret and Norv were pretty close, if he doesn't want him as his OC then this surely explains why Cameron didn't promote him to be ours:
"Sources told ESPN.com's Matt Mosley one of the holdups to Turner's candidacy is that he doesn't think Garrett is ready to be an offensive coordinator. Garrett interviewed for the head coaching position almost two weeks ago, but he's been expected to be named the offensive coordinator.
Jones would like for Garrett to take on some of the play-calling reponsibilities, but sources said Turner doesn't think he's ready. Turner is a fan of Garrett's, but may be leaning toward naming Cowboys assistant head coach/offensive line Tony Sparano the offensive coordinator and using Garrett in a different role"
http://sports.espn.go.com/nfl/news/story?id=2755878
"Sources told ESPN.com's Matt Mosley one of the holdups to Turner's candidacy is that he doesn't think Garrett is ready to be an offensive coordinator. Garrett interviewed for the head coaching position almost two weeks ago, but he's been expected to be named the offensive coordinator.
Jones would like for Garrett to take on some of the play-calling reponsibilities, but sources said Turner doesn't think he's ready. Turner is a fan of Garrett's, but may be leaning toward naming Cowboys assistant head coach/offensive line Tony Sparano the offensive coordinator and using Garrett in a different role"
http://sports.espn.go.com/nfl/news/story?id=2755878