I don't think i buy this whole hull design stuff. If you threw a 5hp on there and if the plastic could support it, that thing is going a lot faster. I don't care what the hull design is. The issue is the plastic boat - not the hull.
id bet money that in the not too distant future, motorized kayaks will be going 6-8mph.
Actuakly now that i think of it, the EPDL from old town gets 6mph from a E-bike type of system. I'm pretty sure that hull is probably very similar if not exactly the same as the autopilot.