OK, my two cents. I agree with this article and author with the premise that torture does not work on a general basis. Are there certain, and very few, situations where torture can work; yes, but not as a rule. Can you make someone talk after applying enough pain? Yes, but it's the accuracy of the information that is important during questioning. Under physical duress, everyone will try anything to make the pain stop. They will use whatever information they have at hand, usually taking a queue from their interrogator, as to what information they are looking for. That does not, however, provide the interrogator with the right information. Using mental duress is far more successful, both in military and law enforcement questioning in obtaining the correct and verifiable information. While physical torture will certainly gain you information in a shorter period of time, mental duress will readily give the correct information with enough time.
Not if the person being interrogated understands that their information will be verified, and if found inaccurate, additional means will be used to extract valid information.
Also, mental torture takes too long, and is used only in specific circumstances. It is by no means more successful than physical torture.