So my final conclusion is that the W4S Remedy does work, but that it's benefit is related to the source. On low resolution Internet radio the benefits to depth, and low level linearity are most pronounced. On a station like Toronto Jazz with a 96kHz signal it's benefit is less.
The one area which I felt things went for the worst, but hard to tell with Internet radio, was mass strings. It seemed to me that in these cases the strings got very confused.
For the record, I'm using a Logitech Squeezebox Touch with TerraDAC linear supply, Audio Research DAC 8 and plain Toslink between the three. I'm also using a Wireworld 75 Ohm digital cable direct from the SB to the ARC so I can compare signals nearly immediately.