I fail to see how this is news. CBT and REBT have been around for a long time. Just goes to show that if you spend your time reading articles, you won't gain as much as if you read a book (or even better, a textbook). I hate re-reading stuff over and over in pop-psych books and in articles.
This seems relevant to LessWrong, both as an extreme example of how biases can hurt people and as a possible rationality technique. Depression is presumably at the outer end of some spectrum; to the extent that it's caused by cognitive mistakes, people in the middle of the spectrum should be able to benefit from undoing the same mistakes.
http://www.sciencedaily.com/releases/2011/11/111117202935.htm