Copper Grease is used for ruptured appendixes now?? Boy is it ever a wonderful creation! ;)
Seriously, and weak spelling flame aside, surely the makers have to have some evidence to back up their claims? Otherwise I can see them getting into a lot of trouble..
I've got a tub of copper grease to try and sure the squeal on my front brakes before the neighbours complain when I come home late at night. The anti squeal shims aren't there anymore (got a bit bent when replacing pads), so this'll be an acid test, so to speak. If my brakes quietenned down, and stay that way for a few months [1], then the chances are copper grease does the job. If not, then it'll come in handy anyway, so not a complete waste of a couple of quid.
[1] - Or less, as I think one of the discs is on it's way out, so everything's going to be getting replaced if it is... Some time...