Dear Zaikesman: +++++ " To me the real-world value of DD might be where it is right now ..." +++++
I agree, we can buy a SP10 MK2 for 400.00 dls ( with out plynth and tonearm ), a Denon DP 800 for 500.00 0r a SP 10 MK3 for 1,200.00. Btw, all these TT designs comes from more than 20 years ago!!!! ). Any one of these TTs ( with the right plynth/footers/tonearm/mat) can compete not with ++++" any belt-driver in its price range. " ++++ ( like you say ) but with the 40K+ Walker BD TT and for a ridiculous price fraction.
+++++ " Which drive method is allegedly "superior" .." +++++
IN my opinion and if we take only the drive system " per se " then the DD is a superior drive system over the BD one. The first and most important function on a TT is the speed accuracy/stability and here the BD system can't compete with the DD system and this is a fact that any one can see it through measurements and own TT specs, period. Btw, ( at least on my TTs ) one musical reproduction characteristic on the DD TT is the more real and natural decay time of the notes, this give to the sound reproduction a better feel of the " live music " against the BD TT.
+++ " .. the evidence could point toward factors other than drive method ruling the roost at that level. " ++++
Yes, there are several other factors than drive system where one or the other could be superior.
About Stereophile: well the champion at the moment is the BD design Continuum for around 90K, speed accuracy? : 0.006%.
Regards and enjoy the music.
Raul.