15 minute diagnosis - impossible to give an accurate diagnosis in 15 minutes. When I was misdiagnosed by a quack, it took all of 5 minutes. When I found the doctor I see now, she wouldn't really commit to a diagnosis per se until after three appointments, the first being an hour 20 minutes. My therapist took about 3 months of weekly hourly sessions to tell me her opinion, which was the same the current psychiatrist later came to.