I read through that post and I have to give kudo's to Chris for posting that at even his own site. A site that is unfortunately chock full of audio voodoo practitioners.
They love them some Audio Regen with zilch measurements (it's basically a 2 port, powered, USB hub).
The contention is that most USB based DAC's have an issue locking onto the incoming bit stream, therefore making the USB PHY 'work harder', introducing audible noise.
Lonnie over at Emotiva had a comment that mirrored my thoughts:
What crappy USB DAC are you using and, drum roll, where are the measurements.