In the latest denial letter from my insurance company, they stated that I have a right to receive copies of ALL material used in making their decision. I just faxed in the request for this information. I figure, if I know what research they're using to call the procedure experimental, I can better refute it. To date, I only know what my OS submitted, not what they found in other research forums. I also have a right to meet with the review panel - and once I review their materials I will. You may want to check with your insurance company, and see if you can get the same. It may make it easier for Dr. Cole to counter the arguments used by your insurance company.
In another post you also asked how a plug would stop deterioration. It depends a bit on the original cause of damage. If the OS cleans up all the loose edges, and the plug fits in tightly, there isn't a rough surface, and the knee should run smoothly. If damage is the result of an AVN or OCD, the underlying bone could continue to die, causing new damage to the cartilage.
Good luck-
Jess