For those actually interested in the facts behind GG and CLD:
I took Dennis' advice and looked at all the resources on soundproofingcompany.com and one thing is readily apparent: They have put a great deal of time, thought, and effort into creating worthwhile sound-proofing concepts and materials. I have no doubt that GG is probably
the best tool for the job. They explain CLD pretty much just like I did: conversion of kinetic energy into heat. This happens (as predicted earlier) by putting a layer of soft, flexible material between 2 heavy objects with high inertia (such as drywall). From an analysis point, it makes all the sense in the world that 2 layers of stiff, heavy material buffered by a soft, flexible material in between would produce excellent results.
However, there is nothing magical about GG. It's just a latex polymer. It's probably formulated to have a specific amount of elasticity, and hopefully a permanent type (some caulks harden faster than others). Again, I'm sure GG was created with this in mind. I think a lot of people here are getting confused about those of us who are simply curious about the mechanics, and instead thinking that we're trying to just find a cheaper alternative or "disprove" the facts behind GG... Some of you are even seeming to take it personally, like you made the stuff yourself, so just take it easy chaps.
Anyway, for a lot of people (myself included), a manufacturer's claims are not enough information. If that's the case for you, I bet you got a house full of broken slap-chops and shake-weights. Good for you.
For the rest of us, it's worth noting that the independent tests of GG only tested products (like drywall, studs, etc) with and without GG. There is no comparison of GG versus another latex polymer. For pure curiosity, I am just interested in seeing how it performs. That would attest to it's true value and engineering quality.