We actually have very little of the theory posted here. We are trying to gather some real life data to see how it fits in with what we think should be happening.
Yes, we have talked considerably about the possibility of various tunica compositions, in this instance layering. I think this is the thread you are referring to. Tunica Differences While this could definitely impact whether an individual gained or not, it may or may not having bearing on the hypothesis. The theory/hypothesis focuses more on identifying what is taking place in our tissues (either growth or no growth) by how our penile tissues respond to training.
Our goal is to evaluate the data from 100 guys, which is really a small sample (maybe even too small.) We would love to have more but it seems very few are really interested in contributing in the name of science.
Let me tell you the secret that has led me to my goal: my strength lies solely in my tenacity.