I guess my post did perhaps give that impression, but I've actually used all three of the Mini's output options and didn't really like any of them (hence saying I don't like it generally as a transport). I've tried the USB output, the optical output, and used an HDMI de-embedder with a coax output... all feeding my PW DAC. I know there are issues with each of these connection methods, but I didn't like any of them. The USB on my other computers was better and the optical was no-better than optical out of a PS3 (not a real good comparison because cables weren't matched, but still).
In any case, hopefully the new asynchronous USB interface on the Mark II will address these issues.