Activision announced a few days ago that on November the 8th Call of Duty: Modern Warfare 3 had a record-breaking number of concurrent online players (IE: Players present on the game at the same time) on Xbox LIVE of 3.3 millions.
Today the publisher corrected that statement with an official press release, clarifying that it was reported in error. 3.3 Millions is the number of unique users that played the game through the whole day on November the 8th. The highest number of concurrent users is 1.4 million. Much lower, but of course still impressive.
Someone at the Activision marketing department must have a twitchy trigger finger.