http://www.ncbi.nlm.nih.gov/pubmed/10633533
The 24-hour saliva cortisol test costs about $100 and should tell you a lot:
http://labtestsonline.org/understanding/analytes/cortisol/ta...
There are definitive clinical (non-blood) tests for hypothyroid (I mentioned several of them), there are also ways to test for FM/CFS (muscle recovery among others). They just don't get used a lot.
As for quackery -- the only quackery I read in Teitelbaum's book was about the allergy treatment and it's not any more or less quacky than acupuncture (where the research was discredited) so I consider it harmless. Every "canonical" scientist has some kind of nutty side, from Isaac Newton on down the line. (Note: Not comparing Teitelbaum to Newton whatsoever. It's just an ideal, extreme, example.) Everything else in his book is supported with research citations. I've checked them, and others, because I followed his advice.
The other issue is that there is no cheap and easy cortisol test like there is for blood glucose. As far as I can tell it would be possible to develop such a test, but nobody has done it yet for a number of reasons (lack of demand, cost, FDA approval, etc).
If someone were to [1] figure out a definitive test for burnout/CFS and [2] develop/patent a home testing kit they would be very rich and help a lot of people into the bargain.
As for Teitelbaum: while he does have some useful stuff to say, he also peddles a lot of quackery.