NSGARCH, are you sure that the current in speaker cables is lower than PCs?
If one is feeding 16 watts to a 4 ohm speaker, you have 2 amps of current. The power amp feeding the speaker, even at 75% efficiency is using about 21 watts, therefore barely 0.2 amps are running through the PC.
I doubt that you use power amps at full power to break in the PC and even then a 120 watt amp would have only 1 amp (2 amps if both channels running) as current, certainly less than a speaker cable running at only 16 watts.
I think that the statement about PC breaking-in more quickly than speaker cables due to higher current, needs to be re-examined.
Salut, Bob P.