Do you even read what you cite?
One of Abu Zubayda's interrogators, Ali Soufan, later testified to Congress that Zubayda was producing useful information in response to conventional interrogation methods and stopped providing accurate information in response to torture. Ali Soufon, also one of the FBI's most successful interrogators, explained " "When they are in pain, people will say anything to get the pain to stop. Most of the time, they will lie, make up anything to make you stop hurting them. That means the information you're getting is useless."
That aside, which part of that says water boarding isn't torture?