Sure, efficiency matters, and a strong reliable spark makes a difference, but you have to admit some people think they have found the "magic bullet" with a spark plug change. The stock plugs are an ancient design, and modern plugs have significantly more R&D behind them. I'd expect better combustion chamber performance from a more modern product that works within the environment I'm using it in, but it's funny when folks go buy a 10 dollar plug and expect it to elevate their performance to some crazy level. I see folks on another forum that complain because they bought some whiz bang coil/wire/plug setup to replace their perfectly functioning modern system, and they can't "feel" a big difference. If it is lighting reliably and efficiently, the difference will be measured mostly academically. With our bikes, obviously your ignition transforms the whole character of the bike, given that most of our stock systems are so aged and deteriorated.
Speaking of PAMCOs and E-advancers, I'll be ordering soon!