I'm in the long debating not purchasing camp! In essence they just mean that you need less pedal movement for the same response, so equivalent of a bigger shove with the boot, rather than removing drive by wire delay, right.......?
Yes - but based on my experience with the Suzuki, it does work! The car feels much more 'alive'. It's all about the pleasure you derive from driving the car, not about extra power or torque. If some people enjoy more driving a car with a modified accelerator response, then why not?