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
well.....obsessing or not...if an 8 foot cord "DOES" the job better thana 5 foot....would it not be worth the extra $100 or so...considering that one could spend say $2000 on a pair of ICs that might give only 10% more performance than one's old ICs.....and some manufacturers and hobbyists believe the power cord makes the biggest difference and should be the first to be upgraded....as do I
ROMEX? Out done again, rats!

Ie, if you hear a difference, by all means do it! Especially if it's a VH Audio DIY Flavor cord. I like Chris's stuff. I may just buy the components to make a 20 footer to see if I CAN hear a difference. But this time I'll use a hot pink jacket and shrink tubing.
Me, I would think about the room first before I start to think about power cord length. the room will more difference than any cable or IC now if the room is done OK or go spend money on music YMMV Marc