Of course, all the training in the world isn't useful unless a therapist is interested in receiving that training. Speaking as someone with a research-oriented background, not a clinical one (nor even a psychological one), my first instinct would be to start by showing people the strength of the research base behind the treatment. What this paper found, however, is that most therapists responded more favorably to case studies rather than larger research studies.
Which, when you think about it, does make sense. Most therapists are more oriented towards people than they are towards large research studies (I'm the opposite, which helps explain why I'm not a therapist and never will be). This is neither good nor bad, it's just a general trend I've observed. Furthermore, case studies can provide more practical information in explaining how the therapy is carried out, how the patient responded, and what are some common pitfalls. This isn't to say that case studies should replace large research trials, just that they interest therapists more in empirically supported treatments.