I don't think any of the guys on this board have the supercharger...at least none of the regular posters I can think of. Perhaps a lurker or two will pipe in with their experiences.
One question--a stock Xterra weighs ~4000 pounds (4WD version.) What the hell are you stripping out of that Jetta to get it down to 2000? My friend's long-discarded '86 2 door Acura Integra weighed more than that, without rear seats.
Gas mileage--assume 15, less if you put offroad mods on your truck, or drive it like a Jetta.
