A guy in our club has one of the biggest run-ups I've ever seen and he crushes it. I have also seen Jim Oates in the tee box. Complete opposites but the same results. Both players accelerate from slow to fast from the reach back and follow through the hit. I guess it's whatever you learned when you started playing. I asked Jim Oates how he began to drive with no run-up and he said he started playing while recovering from a soccer injury (broken foot) and he just learned to accelerate with no run-up.
I have a lot to learn.......but it sure is great to see different styles and techniques.