Longer Power Cords Sound better?


In my quest for power cords, i have noticed that a longer cord say 6 or 8 feet tends to have a nicer sound in my system that the same models that are 3 or 4 feet.
Power cords i have found this to be true include Cerious Tech, Cardas, and VH Audio....anyone have an explanation?

AND by nicer sound I mean they tend to have a richer midrange, and a more coherent top to bottom presentation.
ie
C'mon you guys, be serious here. Everyone knows it's how you 'make contact' that counts. I find plugging n' unplugging really fast for a minute or so to do the trick...
Matty:
Which batteries sound best?
How many batteries is best?
Are there audiophile battery posts?
:):):):):) LOL
Actually, Caelin Gabriel doesn't say shorter is not better. He say's shorter is not automatically better.
And I still disagree. If a pc sounds 'worse' in a shorter length, then it's the wrong pc for that application.
If you're sticking with one specific brand and model of PC, it may sound best in a longer length, but that's not to say that a different model of pc that has a better 'synergy' with the component won't sound better in a shorter length, because it will. Every time IMO.
If you ask me, there's a bit of the 'one size fits all' mentality in the pc biz.