Lew - it makes sense to me, moreso with the Rega philosophy of light plinths and arms, not so much with the heavy platters and clamps, etc., as long as the table is isolated well (mine is on top of a Townshend platform that sits on a wall mounted shelf). The vibrations I measure (admittedly with a rudimentary iPhone app) on the plinth while the stereo is on is about 1/100th of those of my amps that sit on isolating roller blocks on top of a credenza (directly on the suspended wood floor).
The eclipse is kind of expensive but you can tell it is intricately constructed by hand. Like I said, the Rega felt mat was fine, just couldn't stand the mat lifting off when flipping a record and decided I didn't like the 2 sided tape I put on the platter to hold the mat down. Just my "little" OCD knowing it was there made me get a new mat, and the stereo does sound better than ever. Hard to know what little change affected it and by what %, but as long as it is improving (as long as the record isn't warped - I catch that when I buy them and return them if they are warped) I am happy (for now). Since everything is now isolated or having vibrations drained, I've taken it as far as it can go, and probably will only make changes when something breaks or the stylus wears out.