Before I staggered the jetting, the performance at the WOT was lazy especially when the hotter Summer air set in. Then when I noticed the A/F difference in the sensors, I figured that is was just too rich for my combo. If I leaned out both rear jets at the same time, then I lost power and I got detonation at WOT. Then when I jetted back up, there was no detonation but the performance was down. So once I leaned out the side that was rich, the seat of the pants performance came back. I was very happy with the reaction of the car.
I am not close enough to a track to do any testing. My car is a street car and fortunately I have some areas that I can hit WOT without bothering others for my testing.
I have not done an idle to WOT (shift point) test but maybe in the near future I can try that out.