Mike, I've read all the things that say its a myth and all the things that say its not, however here's the thing that article doesn't account for. by exposing the cables initially to current flow you basically begin the possability for good oxidation (note some cables oxidize better than others). Listen, it's not gonna affect the sound THAT much, but oxidation does help or impede current flow based upon the material oxidizing.
"burning in silver cables" the entire point of silver cables is that silver is less prone to oxidation, also that silver has less resistance, higher impedence/better current flow. introducing current into the conductor will have no given effect on oxidation.
i may not know how to drive a stick shift, but i've been a phone man for years, i do know how conductors work.
2 factors *IF ANYTHING* that would have any effect is the difference in temperature. as the conductor temperature rises resistance drops, meaning more flow. a good example that uses this is a thermocouple in a furnace. the pilot goes out, the tc no longer is heated from a flame, the resistance rises, triggering the furnace to cut off the flow of gas.
lets say the manufacturer of the conducter introduces an oil or something else the the exterior of the conductor to inhibit oxidation during transit it is possible but not likely that it would impede contact until the conducters were heated, in a way "burning" or evaporating the oil or whatever coating off. as far as i know this is not done , even if so the plausability of such a coating impeding conductivity is not likely.
i can see it now:
"come on brah, we're gonna get in late"
"no man, my cables were in my cold trunk all day i gotta get em warmed up first"