I can see their reasoning in using low end power cables because in my system, they made the least difference.
So, this is a problem around power cords. Most if the entry level power cords are nothing but basic electrical wire with a nice jacket hence you do not hear anything significant. But once you cross a certain level, power cords take over. Seriously, they become the most significant cable, more than the IC or the SC. They change things at the very fundamental level. They affect the way the equipment generates the signal. But you hear all this only when you go to the next level of power cords. Something like a Tel Wire, Lessloss, Shunyata Python, Transparent Reference, Purist Aqueous etc.
I would go with PC -> IC -> SC.