Doug Rauch (Santana) was double-thumping over 35 years ago. And he's not the only one. What's the big deal? The thumb is an appendage governed by your brain. There are lots of possibilities for thumb technique.......double thumping is pretty boring (and obnoxioius IMHO) after executing the first circus act.
I think it was mentioned because many are under the impression that this is a 'new' thing invented by Victor Wooten, or some such. That's all.
Any value judgement is probably best reserved for the actual application, as opposed to the technique, per se.
Also, the 'Greek' guest list in Berkely is full; talkbass member 'JADY' is getting a couple tix for that one!