We did not learn Abu Ahmed’s real name or alias as a result of waterboarding or any "enhanced interrogation technique" used on a detainee in U.S. custody.
Source, in full
On claims of waterboarding as being impedimental in as quoted in "John McCain to Bush apologists: Stop lying about Bin Laden and torture" by Greg Sar in The Washington Post (12 May 2011) - YouTube video of McCaine's speech