The fact Sirquack spent more money than you has nothing to do with it. From what I can make of the GedLee study, he randomly located the 4 subs in his room with no corner loading and took some readings, big deal, it is well known to keep your subs out of the corners for best response and having four in the room will even out the frequency response, multiple sub placement basics these days.
The economical part I suspect is in reference to the lack of buying seperate EQing equipment and room treatments, not in that it works better for cheaper subs.
You pay for better overall performance when you are talking about subs and in particular low end extension.
