I agree. 

Everyone has jumped so solidly on the Oakland bandwagon based only on last year. 

First, I think Oakland surprised everyone a little last year by improving to the point that they were semi-competitive. Second, they were extremely lucky last year. I watched the New  Orleans game which started the Oakland confidence run, and basically New Orleans was shafted by a pass interference call against them when Oakland was 4th and forever. Carr flung the ball hopelessly out-of-bounds and the stupid ref awarded Oakland a first and 10 inside the 15 yard line. This was on the second to last drive of the game. Oakland should have lost. 

Then JDR made one lucky two point call that save another game. etc, etc, If either of those games would have gone the other way, then Oakland wouldn't have made the play-offs again and this was playing a 3rd place schedule.

My guess is they underperform this year.