[Nate...]

Sounds to me like you understand the difference between turbo lag and boost threshold. Because you are describing a roll on scenario and not a from 0 scenario. A from 0 (mph/wheelspeed/engine RPM/whatever) situation has more to do with boost threshold than turbo lag.

So considering that this is a conversation about turbo lag, any flow mod (intake exhaust) has the potential to reduce the amount of time it takes the turbo to reach boost when you are at an RPM > the boost threshold.

IMHO throttle controllers are an interesting solution to this as well. *Note to the throttle controller haters, please read this carefully before replying* The throttle control will often be sending a signal > the actual pedal position. This means that the engine will likely be able to make boost sooner. Additionally the predictive ramping of a throttle controller may reduce (however minimally) the amount of time it takes to reach full boost. Subjectively my car felt like it had less turbo lag after installing a throttle controller on my car (because the throttle map changed).

For the manual cars I really enjoy the no lift shift feature. It dramatically reduces the lag feeling during WOT up-shifts.

Hope my rant helped a little. Thanks for joining the community man0steel