I too also get asked regularly by patients what the differences are between physios, osteos and chiropractors. I think it helps to keep an open mind about what the other professions do and feel that we should all be able to learn from each other.
To change the topic slightly - I am currently looking into an accelerated Osteopathic course in London and was wondering if anyone else had completed this (or knew anybody else who had) who may be able to give me some feedback of the course itself or their experiences since.