Yes it is their nice marketing video I also saw and believed in. After further research after buying two units it turned up to be BS. Simply response rate is the same but you feel like you getting more and faster as with the same press pedal travel you are getting more power based on setting you have set up. Simply you are getting a more aggressive punch (with the same pedal travel accelerator thinks you are pressing further than actually you did) which make you feel you are getting faster. If you floor it 100% without it will yield the same result as flooring with SB at 50% (depending on setting chosen)
My buddy and I have measured with full gas pedal punch with and without SB on a drag strip. Guess what, we were getting almost identical times each time in both 18 4runner and 16 LC. Initially thought that maybe I have mixed up units and installed wrong one in each car which was not the case. So started doing more research and found this article which confirmed my observations.
Sprint Booster – Is It Worth It? – outbackjoe