From the referenced WP page:

By the end of 1980, the collaboration between Bandler and Grinder ended. [...] In July 1996 and January 1997, Bandler instituted a further two civil actions against Grinder and his company, numerous other prominent figures in NLP and 200 further initially unnamed persons. [...] On this matter Stollznow (2010) comments, "[i]ronically, Bandler and Grinder feuded in the 1980s over trademark and theory disputes. Tellingly, none of their myriad of NLP models, pillars, and principles helped these founders to resolve their personal and professional conflicts."

It may not be a very scientific rebuttal, but I always find that interesting. (Kinda similar to how psychics never win the lottery.)