I use a fairly cheap Shimano Compre 6-8 medium power/fast action rod for my jerk baits. Sometimes you want hi-tech, sometimes you want lo-tech. With a jerk bait, you sure don't want to feel a fish breathe on your lure. Like a crank bait, you want him to have time to take the bait fully before your brain engages and you start pulling back.
A fast action actually has a softer tip than extra fast, for those unfamiliar with the terminology. It also bends farther down into the rod, which is called a parabolic action. The end result is it "gives" more when you and the fish are pulling against each other, hopefully preventing you from losing the fish. But you still need to never "horse" a fish on a treble hook lure --- or any lure for that matter unless you just HAVE to get the fish out of heavy cover.