Rang's roots are local. Since he's gone national in the media, I think he's been less accurate with his analysis of the Hawks. That move pretty much coincided with the change to Carroll, though, so both probably contribute to some questionable predictions.
We all remember (I think) how he nailed the Tatupu pick. That one alone probably sealed his rep among Seattle fans beyond what it should actually be. Now, I think of him as just another talking head for the most part.