bust out your history books then.
i saw those E3 plugs tested on trucks (or one of the like shows) a few months ago. using a crate engine hooked to an engine dyno, they did 6 pulls with time to cool between each run. 3 pulls with the leading platinum plug and 3 pulls with the E3's. the E3 plugs provided a consistant improvement in power (i dont recall the exact number...something in the range of 5-7 hp) and lowered BSFC considerably. meaning in this case, yes the provide more power with less fuel.
i know one series of tests doesnt prove anything...but a strong arguement none the less