I'm not sure it's sound degradation as much as it may be not as big of an improvement if everything is not plugged into the same conditioner.
I'm not sure, either. The Stereophile article made it seem like it made everything sound worse when all the components weren't plugged in together. I'm thinking of maybe selling it and changing my power cords for the source and preamp to Cardas Clear Beyond, which has filtration built in.