On several occasions, according to present day Gitmo interrogators, detainees actually complained about the unprofessional nature of these early interrogations and some astoundingly even offered advice to the interrogators on how to conduct a more effective session.
I buy it. Sounds like the spook equivalent of the old joke about the engineer and the guillotine. Professionals have a hard time sitting there watching a job be done badly. I'm picturing some scarred instructor yelling at an army two-striper about poor technique. "I'd've flunked your infidel ass out of my class!"