Except for when they originally announced Cataclysm, and it was listed as a dungeon:
http://wow.joystiq.com/2009/08/22/bl...lysm-dungeons/
http://wow.joystiq.com/photos/blizzc...llery/#2228320
Remember, too, that the original plan was for Firelands to be in at launch. It was later that they bumped it to 4.1 with the Abyssal Maw dungeon (which was only ever referred to as a raid in a single announcement, so that bit may have been in error), and then to 4.2 (when Abyssal Maw was dropped entirely).