[.:4:.]

I swear blind by impact drivers for driving in screws. Even using a cordless drill with the clutch set down, the clutch on an impact is different. It will slow the screw, yet keep going and at the same time, not round out the head of the screw or anything like that. Yeah, depends to a degree of trigger happiness with new impacts, as they take a little bit to wear in to being awsome. But thrashing impacts 6 days a week for over a decade, hands down they beat a cordless drill when it comes to belting screws into wood, metal, villaboard or whatever you belt screws into.
Drills are for drilling holes and holesawing. On site, ive never seen a builder put a screw tip in a drill to put screws in anything.