It seems that this is only an issue at WOT high RPM 1-2 shifts and is somewhat sporadic. Does lowering the pressure to eliminate the 1-2 stutter result in a "lag" during the shift similar to stock tune....or is is still firm and crisp but without the stutter?
If you were going to the track, would you want the higher pressure and potential stutter or would you want the pressure dialed back? Like others, I have experienced this after a reflash but it typically calms down some after driving awhile and has never occurred at less than WOT.