These are the same people who've claimed that gold-plated connectors sound better, or promote "oxygen-free" copper for its "superior" signal transmission qualities.
I'd love to have any of these self-proclaimed "engineer" submit to a truly blind, random listening test, and see if they can simply pick out their "high def" playback from an ordinary CD. When a similar test was done to compare high and low end stereo systems (after much reluctance, when the blind nature of the trial was revealed) a similar gaggle of audio "experts" wound up picking out a cheap, ~$100 K-Mart utility system over a staggeringly expensive, multi-thousand dollar one. More than once.
The Myth of the Golden Ear has simply found a new bottle of snake oil to hawk.