Okay, I had the opportunity to hear what a very good uro and a surgeon has to say about firmness.
He said that firm flaccid means there is a fibrosis, fibrotic tissue in the penis. This tissue, he said, is easier to contract if one has thicker skin, as the skin thickness somehow corelates to some layers of tissue in the penis and to the healing abilities. To some extent it can heal on its own. For some people it can completely disappear. The healing time is 6 months to a year. If it doesn’t heal by then, surgey is advised. It is very similar in appearance and effects to a venous leak (this we all know) and so it can theoretically be corrected using venous ligation/stripping surgery, provided that it is done by someone extremely efficient and that the site of fibrosis is found/located. The tests to do this are cavernosogram and possibly MRI.
I cannot take credit for this, it was made available by someone else. Tonight spend 5 minutes mentally wishing and praying for best possible dick fortune to this person. I am not kidding.
It is interesting to note that I have found someone who visited a specialist with PE injury experience that has had a completely different diagnosis, one that goes with collagen. The guys name is “hyperlite” and I believe that he participated in this very thread. It is here http://www.mattersofsize.com/forum/showthread.php?17189-Erection-problems-from-PE-(I-think)/page6
This explanation is much closer to the one Michael21 had.