I picked the car back up today from the dealership. The SC was replaced and in them doing it as a whole unit the valve/actuator were also replaced. They also replaced the SC belt. The tech said he did notice the SC was making noise before the repair. After the repair they test drove my car with a computer and then compared it to a new one off the showroom floor (could tell they drove it because it had bug splats on it and the tires were dirty). They said it was nearly the same based on the readings taken. So my thoughts driving it home... It is now making 7-8psi (more where I thought it should be); about 2-3 psi higher than before. It also seems to register on the boost gauge earlier when I go about 40% throttle. I also spun the wheels without meaning to in touring mode at an intersection. Then close to home I re-tried the launch with TC disabled in sport mode and the wheels spun all the way through first gear. So judging by the non-calibrated "seat of my pants", it definitely feels better. Next step, another dyno run and another run with another stock V to compare.
On a side note, my friend following me after leaving the dealership noticed a little smoke from the tailpipes when I got on it. I figure that may be due to the new part and some contaminants being burnt off. I assume that will disappear pretty quickly, but should that be an issue or will it go away in the near future?