Supercharge Or Turbo?

I have owned a turbo charged mopar continiously since May of 1985 when I got my first turbo Daytona. The single biggest disadvantage of an exhaust driven turbo compared to a crank shaft driven supercharger is turbo lag. It doesn't make any difference at what rpm the engine is turning at if there is not sufficient load on the engine to require the throttle blade(s) to be significantly open there is not enough exhaust velocity to spin the turbo fast enough to generate boost. So everytime you close the throttle and open it again you have to wait for the turbo spool up before it makes boost. Compared to a supercharger where the boost is directly proportional to the rpm the engine is turning, no lag.