The BBC has published a brief Q&A about waterboarding on their news website. It is a concise overview of the Bush administration's policies and procedures. In response to the question of whether or not waterboarding is effective, BBC references the case of Al-Qaeda suspect Abu Zubayda.
According to ex-CIA officer John Kiriakou, al-Qaeda suspect Abu Zubaydah "broke" within half a minute. Abu Zubaydah said later that he had made things up to satisfy his interrogators.
Check out the complete exchange at:
http://news.bbc.co.uk/2/hi/americas/7151828.stm