User blog comment:Bovell/Escalation hits PC June 2. PS3 version of the DLC still unannounced./@comment-94.1.142.155-20110520214153/@comment-173.76.10.151-20110521131611

They physically can't. Activision made a contract with Microsoft to release all Call of Duty related DLC on the Xbox 360 at least one month a head of all other consoles.