I should be clear that when I talk about natural, organic dynamic relationships with power cables, I'm referring to musical dynamics; both macro and micro, although I really don't much care for those terms. You certainly don't lose 'macro' dynamics when using a mega-gauge pc, but you do (in my experience) lose the natural sounding link between musical fundamentals and harmonics.
Although it's not a perfect analogy, the change in sound reminds me of an old analog 70's 'Dynamic Range Expander'. By pushing the obvious dynamics to the front, and relegating the smaller dynamics to the back, it made for a 'weird' musical presentation.
The reason I say this often sounds alluring in a typical high-end system, is because this dynamic 'expansion' if you will, mimics an increase in bass and treble by pushing the 'punchier' bass and percussion to the fore. This tends to offset the midrange emphasis that most high-end systems are designed with (to bring out 'detail').
That's my speech, now feel free to completely ignore me, everyone else does. :)