I'm sure everyone has flipped through the Inspector General's report released Monday, although much was redacted.  http://documents.nytimes.com/c-i-a-reports-on-interrogation-methods#p=1

Interesting that on page 91, it says that "Khalid Shaykh Muhammad, an accomplished resistor, provided only a few intelligence reports prior to the use of the waterboard, and analysis of that information revealed that much of it was outdated, inaccurate or incomplete."

Yet in another section KSM is described as a "prolific" source of information.  To quote the report - "He provided information that helped lead to the arrests of terrorists including Sayfullah Paracha and his son Uzair Paracha, businessmen who Khalid Shaykh Muhammad planned to use to smuggle explosives into the United States; Saleh Almari, a sleeper operative in New York; and Majid Khan, an operative who could enter the United States easily and was tasked to research attacks [redacted]. Khalid Shaykh Muhammad's information also led to the investigation and prosecution of Iyman Faris, the truck driver arrested in early 2003 in Ohio."

Much is redacted but it sure seems that since the use of the waterboard KSM was more cooperative.  And the report says that definitively with respect to Abu Zubaydah