I don't have any sites to point out to you, but your links were interesting. I like the idea of trying to find evidence to disprove your theory - it is something we do in the lab too. Personally, I did not find any of their perspectives convincing. Even the person who tried and did poorly may just not have spent enough time troubleshooting problems.
I have read about, tried, had doubts, been convinced, and failed on MANY other diets. For some reason, when I read about PB, it just felt right to me and I dove right in and never looked back!
Good luck on your search. I hope you find what you are looking for.