Wonderful post. Log is worth looking over carefully. I had no idea boost dropped from +14 at redline to -10 psi in 0.2 seconds during a shift with throttle lift. Then 0.6 sec to recover to 17 psi back on throttle. Very nice, quick and consistent shifts by the way. Generally dropping less than 2K rpm shift to shift.
If this valve upgrade provides benefits, this is the way to see them. Of course, only fanatics care about 0.1's of a second, but we have met the fanatics and they are us.
Now I wonder what flat foot shifting would show. I only use it on track when trying for a fast lap, but it does seem to hold boost better than throttle lift on shifts.