Does it make much of a difference if you rev in neutral?
Here's a video I made to test throttle response. Skip to 50 sec. Details are there as well:
Basically I try to floor it around 1.5-2k RPM in 1st and 2nd from a roll. "Cool" means running test immediately after engine properly warms up. "Hot" means after at least 15-30 min. drive on a warm day in which oil temps are in the 180-200F range. This is an old video in which my car only has an exhaust.
Here's the turbo video (before and after). Skip to 2:05 mark.
For the 3rd gear pull, I keep it steady around 2-3k RPM (~50 mph) and floor it to redline. This is probably my best pull regardless of engine oil temp, but it does make a difference.
The remaining runs are 1st thru 3rd from a roll (freeway entrance), so I try to start at low revs in 1st (1.5-2k RPM).
The goal is to be under 3k RPM (preferably 2k) because it seems like revving past 2.5k typically yields consistent "more poweful" pulls regardless of temps. In other words, starting at low revs result in slower runs. Starting at higher revs result in faster runs. [shrugs]