I wasn't wowed by the job he did with the Raiders, but I remember being surprised when he was fired. Most on commentators at the time were too. I seem to remember the perception being that he he was close to turning the corner at Oakland his 3rd year would be the one to prove if he could actually do it and get them to the playoffs. One of his years at Oakland they were 8-8 overall, but 8-0 in their conference for what it's worth.
I'm not saying he's the answer at coach, but at this point it's intriguing at least.