Using your theory dont you agree that ANY grapphics card with a fan can be called a "dustbuster"?
I too use a reserator, with 3x80mm fans for my case @ 5v, so thats near enough silent.
I can only hear my X1800 hum lightly when running games, benchmarks etc.
Gibbo is a very reliable source, at times he has been accused of being NVIDIA biased, so why on earth would he say the following:
Two fans of the same type are obviously louder than one, and the fact that the cards are installed closely together on the motherboard only means they will pickup the heat from each other, thus raising the core temperatute and so the fan speed.
For people worried this card is loud - it is not. My geforce4 card sitting in my server screams in comparison. my X800XT PE was louder than this card.