In terms of boost, throttle, lag; When you put your foot 100% on the pedal the ECU only reads the pedal position and desired boost(for ur version, not all cars). This being said what you set in the ECU at part throttle will have NO effect since the ECU isn't even looking at the cells during WOT. The time it takes your foot to push the pedal from where ever to the floor is faster than any turbo will ever respond. If you found that you suddenly had better spool times then perhaps there is some thing in the tune beside what your looking at that needs to change to improve those times. My hunch is when you went to 0-1 IAM the severely reduced timing and rich condition aided the spool. I could explain why but we can do that another day.