Are you in Normal or Sport mode when you notice this? This shouldn't be an issue in "N" mode, but Sport has a somewhat wonky throttle response curve that makes shifting quickly a pain. As this car is "throttle-by-wire" the amount the throttle blade has to be open relative to the gas pedal doesn't have to be the same. Having said that, the N mode (and N Custom, as I use Sport+) feels rather linear to me.