If I remember correctly from some previous chats, you are (or were) in PT school. Your professors are finally getting to you with that whole "evidenced based practice" thing aren't they...
Seriously, though, it is what healthcare is going toward more and more - we are going to have to have not only the basic sciences to justify our reasoning behind our interventions, but also the clinical evidence that our interventions work. Otherwise, we are not going to get reimbursed for our services by third-party payers. So, your question is a big one.
I've been studying various schools of thought in manual therapy for a number of years now, and, honestly, there just isn't a lot of solid published clinical evidence to support its use (ART included). This, of course, does not mean that techniques like ART don't work. (I personally utilize various manual techniques with patients everyday with great success.) It is only that there are not a lot of published articles in peer-reviewed research journals to say that any of these types of techniques are effective. You will often see case studies and even some basic science work being published for techniques like ART, but carrying out randomized clinical trials is time-consuming, labor-intensive, and, often, expensive to complete. And, as you likely already know from your research courses, dealing with human subjects can also be very tough to manage both legally and ethically.
So, my answer to your original question is that I don't think there is much (if any) published clinical research to support ART (or most other methods of manual soft tissue techniques for that matter).
But hey, maybe your the guy...maybe you'll be the one to really get the ball rolling on developing the evidence to support this type of practice. If you are into this type of challenge, you might want to check into the APTA's website and look for info regarding support for clinical research initiatives. You might also want to check into orthopaedic / manual therapy residency and/or fellowship programs, which are often trying to train clinicians to be master practitioners along with attempting to provide opportunities for inquiry into manual therapy methods.
Hope this is helpful.
All the best.