I'm not sure I agree with you there. Its identified as a "Load adjustment screw" in all the instructions I have found and in adjusting it in a and out myself. Yes, I did blow my motor because I tightened it down too far and boost to infinity, but it does allow me to adjust boost pressure +/- 1 or so psi.
Your right though, if it does adjust the "sharpness" (as my profec calls it) of how the wastegate reacts to boost and holds the wastegate closed for a longer period of time before the set boos tis oobtained, that is a good thing. I'd rather it be spooling my turbo up than dumpin git through my exhaust system.
I'm going to do some more research on this though. You got me thinking about it.
Wyatt Leras
http://www.turbogs.com
98 Eclipse GS Star Stage 5,000 Turbo kit