Sorry, but I will never believe non-subjective tests unless they have been done as double-blind tests. It is far too easy for the mind to play tricks on us. Some of the worlds smartest scientists have fallen into this trap, eg, Cold Fusion.
Also. as far as mats go, if you live in cold, dry climate like I do, the worst mat is the one that collects static charge. It actually blasts holes into your records causing the dreaded 'pops'. Cork is the only way to go.

