I think we should not engage in a battle of words and rather look into the facts in each point of discussion. While I agree that more experience is needed to master particular tests and more research in needed to test the validity and reliability of new ones, I think we should consider the significance of testing to orthopeadic testings to us as physiotherapist. In the interest of efficiency of productivity, there is no need for a test if we can not generate useful information from it.
As physiotherapist our primary goal is to resolve our patients symptoms or ameliorate as much as possible. Our patients dont care what name the problem is either what they want is the pain resolved. Although
SIJ testing may acurately inform us of a sij dysfunction, it does not tell us what and how to treat. This is the same for most orthopeadic tests. Our treatment would most likely be same for a +ve Varus and a +Ve valgus stress tests of the knee so why border?
My point is orthopeadic testings are more applicable to surgeons because they are structural based same as most of the diagnostic investigations. This model of clinical examination is purely biomedical and it is of little importance to us as physiotherapist. While the knowledge of biomedical testings are important, we as physiotherapist need to look into different models of assessment. The core of our treatment is to correct pathokinesiology. So our assessments need to be movement based as not structural based. A classical example is with a patient with +ve anterior drawers test from torn anterior cruciate confirmed with MRI and can still play competive football at high level. This is because Drawer's test assesses the passive stability in a relaxed position, while the active stabilizers kicks in when the patient is performing active function.
A few authors has been working functional differenciation and symptom modification procedures, although not fully researched yet, they are showing high clinical results. i think this is the next dirrection in the field of neuromusculoskeletal therapy.