As I have explained in my book review, where I do have a problem with Pies is that I do not think he sufficiently knowledges that minds are not reducible to brains. For example, in another Psychiatric Times article on the BPS report, he says that "schizophrenia is often associated with neuropathology". He deliberately highlights the word "associated" because he does not want to imply causation necessarily. However, he tends to imply just that and it's difficult to see that he means otherwise. Psychiatrists do believe schizophrenia and psychosis are brain diseases and I think Ronald Pies does as well.
(With thanks to Around The Web post on Mad in America)