Stif, the team has done a good job of ignoring the Vick situation. I didn't exactly mark this as a motivational thing, I simply didn't account for a distraction due to the circumstance.
The real value comes from the backup QB competition.
The market has now shifted down to +3.5, so I don't think you'll see +4 for much longer. I was very conservative with my odds, so that might provide some value, too.