I just don't think you guys are going to see it in action during anything other than a light throttle run. At WOT (or any boost #) there are a number of things that can affect timing so you'd have no way to know what is contributing to the number changing. Another thing to note is that the ECU will reduce timing at the shifts to save the tranny and preserve shift quality (aka Torque Management). There are a LOT of variables that go in to determining timing (mean best torque tables, octane tables, etc...) and multiple adders and subtracters (IAT, Coolant Temp, Knock, ...).
I would at least try my experiment at light throttle where the car starts showing incremental negative KR and watch what the timing is doing during that. That should at least minimize the number of variables.