Sparky Did Dana have a 'machine' that showed all that, or did he take you outside? Did your speed increase a lot, in just several minutes?
I'd bet the fella that John had was skeptical of the machine, as I would be. jmo, but yes, you can gain distance, without that 7 mph in swingspeed. I'm assuming after the distance was seen, the machine just computed what 'should' be the speed. Even seeing the distance increase in actuality does not mean he was swinging that much faster. He was merely 'hitting;' better.