That test isn't testing what this card is supposed to do. He sould test the SNR of the audio card in his system.

In fact if your read the quote again:
"It reduces the noise distortion generated from high-end graphic card (from both Radeon and GeForce) OR TV tuner card"

TV tuner cards are purported a source of noise, not as a piece of hardware this card is claimed to increase the SNR of.

I'm actually interested in seeing results of a proper test.

I don't think Wired Science (the PBS science magazine) thought it was bull when they did a story about it last year.

http://www.wired.com/science/discoveries/multimedia/2007/10/body_builders

I'd just like to drop in and say that in general Japanese milk tastes bad. I did some research after returning from a year in Japan and a lot of people say it's because it is pasteurized at a higher temperature to give the milk really long shelf life, or because I was buying milk that was reconstituted or both. *yuck*