Actually I was referring to Carolina figuring out how to defend him. Their pass rushers play him like he's a pocket QB that they can chase down which they can't. The teams that shut him down have their pass rushers maintain lane discipline and surround him.
Gotcha. Sorry about the confusion. Still pretty early, even though I woke up at 2AM.
Vick went on Inside the NFL and said that his passing deficiencies are due to bad receivers, not any lack of skill on his part. This guy would fit right in with the Raiders.
If you have the secondary that can cover, then the pass rush should (as you say) penetrate, stay in the lanes, & wait for the QB to "pull it down". Sacks result.
Ideally you'd like to get a good push from your tackles while your ends maintain contain. I'd also assign my best open field tackler (LB or Safety) to 'spy' a QB like Vick (but I'd mix that up since I think he's capable of beating a spy with his arm).
The Eagles rushing QB's (Cunningham & McNabb) were always among the most sacked QB's in the league despite decent O-lines & their own reputations as mobile quarterbacks. There's a difference between a running QB & a QB that is mobile in the pocket.