The breaking suggestion may indeed have some merit, but you'll never know unless you try it.
12 Volt Cable Burn In?
I just made a pair of CAT 5 speaker cables following the Venhaus recommendations. A gentleman who worked at the cable vendor suggested that a speedy break in could be accomplished by connecting one cable end to a light bulb receptacle and the other to an electrical outlet and illuminating a 12 volt bulb for 24 hours. Any thoughts?