Midwest-Audio speaker cables-giant killers?

Has anyone heard and/or tried these self proclaimed "giant killer" speaker cables from Midwest-Audio? http://www.midwest-audio.com/

They have a listing on eBay:


The strange thing is, they don't list these copper cables on their Website.
I bought a pair of the Silver Braid speaker cable and they are very nice especially with the WBT connectors.Very natural sounding and reasonbly priced.