I have the DBW with the ECM. You notice the kick from the ECM at any throttle above 4K RPMs. Massive powerband now, starting at 4K RPM. Literally will throw your head back as you throttle into it- even if you gently start increasing the throttle level into that range, as opposed to flooring it right off the bat.As far as the ECM goes, you should ask yourself how often you drive at full throttle. I think I remember Jeff saying the ECM only "kicks in" at full throttle.