Izof, you have got the essential point here: "Now ... on the other hand, witness that there is a HALL of a lot to be said about "word of mouth"! IT'S WORKING! And THAT is because of, and a measure of, how very very good the product is." — the echoes in your HALL do not die out. Hell of a point!
What's unusual about this product is that it actually works, and seems to work unusually well. This means a high percentage of people who try it will stick with it and will pass the word. This is not typical of most supplements. It's the foundation stone of some of the optimism expressed by NukeJohn and others. What we have here is not waves of fading enthusiasm, but waves of lasting enthusiasm.
A true viral explosion with "stickiness" is happening, i.e. the early nodes in the explosion do not die out: they keep communicating and activating new nodes. The mathematics of this kind of robust expansion is staggering. I think that may be what is happening with Anatabloc.