On one hand, Norv Turner has a good track record from 2007 - 2011 where the Chargers were a top 5 offense by points scored. On the other hand, the Chargers had LT, Gates, and Rivers (before Rivers turned into whoever Rivers is these days), and the AFC West was pretty lean during those years. He also has a lousy record against the Pats so I think that weighs against him. I'm not saying he couldn't do a good job here, but its not a sure shot.
His track record goes back much further than the Chargers ... check out his wiki.