A supercharger has no lag; because its air pump is linked directly to the engine's crankshaft, it's always spinning and instantly responsive. The power boost it provides, and therefore the engine response you feel through the seat of your pants, increases immediately in direct proportion to how far you press the accelerator.
While the turbo's primary drawback is boost lag, the supercharger's is efficiency. Because a supercharger uses the engine's own power to spin itself, it siphons power-more and more of it as engine revs climb. Supercharged engines tend to be less fuel efficient for this reason. For developing mega power with instant kick-you-in-the-back throttle response, however, supercharging rules. It's employed by several big-muscle machines such as the 650-hp Chevrolet Corvette Z06 and 755-horse ZR1 and Dodge`s 700-plus-hp SRT Challenger Hellcats and Demons.