I know nothing about these power cords other than what I've read here. However, based upon my DIY experience building power cords. It would not surprise me if this series of cords has substantial shielding and dampening of the conductors. That would explain to me why some perceive an extraordinarily black background. In my own system, I have found very little use for shielded power cords. The only component that I found benefits from a shielded cord is my tube pre-amp. I'm only one individual, so take my comments with a gain of salt.
