I found some info, tho in the context of autos. they do say the nology does indeed provide a stronger spark, but also says....

"A stronger spark does not always equal more HP. If your stock ignition is reliably lighting the mixture, you can add as much spark energy as you want, but it won't make any more horsepower. To date no independent dynamometer test I know of has shown any increase in horsepower over stock wires that were working properly."

heres the article...
http://www.mr2.com/TEXT/DavidKucharczyk/ignition.html