Quite a can of worms I opened.
I've been on the phone to Polk nearly every day since this thread began, buying a subwoofer and asking various questions... They seem to employ people who are truly passionate about audio.
Of course the subject of bi-wiring has come up several times, and it's worth noting that opinion is split down the middle, even at Polk. Some believe in it, others do not.
Perhaps it take a noob like myself to point out the obvious... I've done some fairly heavy reading, and the fact is that no proof exists that absolutely
supports or debunks bi-wiring. None. Nada. Zip. Zilch.
Any reasonable person is certainly entitled to lean towards one side of the fence or another in such a scenario, but only an idiot covers his ears and rants before conclusive proof has been established.
For my part, I believe I heard a difference. I'm inclined to think it helps in some situations. However, I'll keep an open mind... And I'll certainly accept it if proof is ever irrefutably established that disproves the effectiveness of bi-wiring.
I've always thought staying slightly off-center from neutral is a wise course of action when weighing in on unresolved issues. An opinion is a fine thing to have, but deeply ingrained hotly-held beliefs will eventually make an ass out of one... At least fifty percent of the time.