Pathetic throttle response - Causes & solutions

Sales video. MCM did a couple of feature on plug in tuning boxes. none made any noticeable difference. Even on the dyno.
There has been lots of other independent videos done showing the same results.
the videos I've been watching is the race chip xlr which connects through the throttle pedal and is supposed to just give you 7 different throttle responses no expert but it did look pretty good