Hi Monte,
Yes, I have talked with them at length about their mattress design and the theories and practice behind it. Each of the top two layers are zoned with separate ILD’s of softer foam in the upper roughly 1/3 area (under the shoulders) and with firmer foam in the remaining lower area (under the hips). Both the 2" layer and the 3" layer have separate zoning with the middle layer being firmer than the upper layer (although not as firm as the bottom 6"). In addition to this … the place where the two layers are cut allows the firmer foam in the lower part of the 2" layer to overlap the softer part of the 3" layer by a couple of inches so there is about 2" of gentle slightly firmer support in the arch of the back. The cut lines and the ILD’s are chosen according to each persons unique measurements, weight, sleeping positions, and preferences so that they are custom designed for each individual. They also offer layer exchanges for each “part” if it isn’t perfect in actual use.
If you look at the example on their front page (lower right and click on larger view) … you’ll see the different sections which can be customized (each color is a different piece and ILD of Talalay latex). The exact size and ILD of the pieces are chosen for each individual.
While they are a premium mattress with a higher than “normal” price if you only go by the amount of latex … they are also unique and exceptionally “accurate” because of the individual and unique zoning and design of each mattress.
Regarding the Atlanta area … Post #2 and #6 in this thread should be helpful 
Phoenix