I'll take a shot at answering this but please correct me if I'm wrong or close.
Roughing up the bottom with Scotch-brite or sandpaper helps to remove stiction (it's a real word if you haven't heard it, a combo of sticking and friction) and helps to create a tiny cushion of air bubbles under the hull. The sailboaters figured this out years ago trying to get more speed out of them. Waxing a hull adds to the problem, the opposite of what you'd think that it would as substances like carnauba will roll up into tiny balls from the friction of the water.
This will work on any boat, not just the Aquacrafts.
Some will go to other ways of doing basically the same thing such as mixing a graphite powder in with some epoxy and applying it to the hull's bottom then sanding it lengthwise with 400 grit sandpaper.
I've got someone doing some testing for me on another product, I'm waiting to see what his results are.
Mike, if you're interested in trying it, I'll send you some. It's a Teflon tape that I get the roll ends from at work.