I parked one at work the other day. It actually came as a bit of a shock when I saw the 'diesel' badge on the front wing (I had no idea that Porsche would go over to the dark side!)
With that said because of the VW connection it makes sense and considering how most people drive Cayennes anyways its only natural. Its not a particurally fast car unless you buy the top end models and even then, what's the point? If you want to go fast buy a real Porsche sports car, they certainly have plenty to choose from