I think the pianist would react more to differences in the voicing than the tuning. What types of pianos were tuned for this trial and what were their tonal characteristics? It would be interesting to know.
The Equal-beating Pythagorean temperament was used on a Weber console.
The 1/10th comma meantone was used on a Story and Clark console.
I think the EBVT III was used on a Bergman console.
I Expected the results to be:
1/10th comma meantone the winner
EBVT III a close second
I expected the Equal-beating Pythagorean Temperament to be disliked. It seemed dry and clinical. It didn't seem warm and expressive. But, the expansion of the temperament seemed to work well in all areas of the piano and the piano sounded very much in tune "globally", not just "locally." If you refer to the rollingball.com site, it states: "Moscow sought 'the easiest to tune equal-beating temperament ever devised' --and had no problem selling this temperament to musicians and calling it equal temperament in 1895." www.rollingball.com
Instead, it seemed that EBVT III and EBPT were both very much preferred, and the 1/10th CM was very much disliked.
Emmery, this pianist was hardly the average player. I still don't see why pianists should not be able to take advantage of alternative tunings if they are harmless to the piano.