I wouldnt blame the supercharger its either on or off due to the clutch, what OP is describing sounds more like the slow drive by wire. If his car is stock, id put a tune on it. In auto only mode and stock the throttle and gas pedal talk to each through molasses. Its a little bit better when in manual but not by much. That delay is horrible. Drive by wire during the 90's when they were being put on cars were horrible. They are much better on today's cars obviously but just like electronic steering assist is working out the bugs to feel more natural like hydraulic assisted steering, drive by wire went through the same thing.