If you're not looking for anecdotal evidence, what would you like to see? Be specific and I'm sure someone will compile the info or help you find it.
Then you shouldn't be browsing in talk forums. By definition, everything you read here will be anecdotal. Now if you want scientific evidence with peer-reviewed reports you'll need to look elsewhere.I guess I would like to see something more than anecdote.
In answer to Lex: I'd say some independent tests conducted with more than one rifle. Say, 10 random prodcution rifles compared against 10 ARs made by somebody like Bushmaster or somesuch. No manufacturing flaws - I'm not worried about that sort of thing as they can be identified upon purchase and fixed at leisure; I'm much more worried about break-downs in the field. Anyways, give them 500 rounds of break in, and then start the test using some milspec ammo - say 5000-1000 rounds per rifle. Allow cleaning, but no tightening or regluing. Obviously, a bigger sample - say 25 or 50 rifles - will provide a more reliable results.