Same rating scale as for books.
I'd go down to a D2, and possibly a D1.
The brutal fact is that the Broncos SUCK. The clock has officially started on the "Fire Josh McDaniels" watch. I've never seen a professional football team so poorly prepared and motivated. Its halftime vs. the Raiders (BARF), and the score is Raiders 38, Broncos 7.
Any head coach that can make Tom Cable look like the 2nd coming of John Madden should be fired at halftime. I'm embarassed to have supported McDaniels in the past. His teams are soft, poorly disciplined, and mentally weak.
Definitely a D1.