Sidney Blumenthal isn’t buying the claims of Bush, Kay, et al.:
The truth is that much of the intelligence community did not fail, but presented correct assessments and warnings, that were overridden and suppressed. On virtually every single important claim made by the Bush administration in its case for war, there was serious dissension. Discordant views – not from individual analysts but from several intelligence agencies as a whole – were kept from the public as momentum was built for a congressional vote on the war resolution.
Precisely because of the qualms the administration encountered, it created a rogue intelligence operation, the Office of Special Plans, located within the Pentagon and under the control of neo-conservatives. The OSP roamed outside the ordinary inter-agency process, stamping its approval on stories from Iraqi exiles that the other agencies dismissed as lacking credibility, and feeding them to the president.
At the same time, constant pressure was applied to the intelligence agencies to force their compliance.
So the “we” in “we were all wrong” means the people the administration paid attention to.