Hi Joab,
I would not actually define your Combato system as an RBSD system, in that it teaches a technical curriculuum (like all other martial art systems), it features a belt ranking systems (like many other martial art systems), and features Asian titles and names (like many modern eclectic martial art systems, which is honestly what this is).
RBSD, as stated, is more a way of approaching your training to prepare for the realities of a real violent encounter (NOTE: Not by giving you techniques to deal with the attacks, although there is often one or two unique movements to each system, but rather by having very confrontational drills and exercises designed to generate the effects of an assault). This does not mean that your system, or indeed, any system, modern, ancient, or undecided is not equipped to handle a real assault, just that the definition of RBSD does not apply here.
My school, for instance, is not RBSD. I have, however, attended a number of RBSD workshops and seminars (and, as I'm writing this, I recieved an e-mail invite to another in a few months), and we integrate aspects of their training philosophy into our schools... just not completely. After all, our students come to us for a Martial Art experience, not an RBSD one. And that's an important thing to remember.
So, if I may, your comment about the claim being "ridiculous" is a little out itself. I did follow your suggestion and visit your schools site, including checking out the "cirriculum" section (just a friendly word of advice, don't know if you are in a position to affect this or not, but a little proof-reading wouldn't go astray. The use of terms such as "Shinan", which I have never encountered, as opposed to "Shihan", which I have, throws up big question marks, not to mention the odd naming of the system itself), and this simply showed all the hallmarks of a modern, eclectic martial art system, not an RBSD.