Is it Double XP on the PS3 ?
I think so, people have said it is..
Activision today announced that Treyarch is hosting its first Call Of Duty: Black Ops Double XP multiplayer weekend starting at 6pm, Friday 4th February until 4pm, Monday,7th February. Anyone playing in multiplayer matches on the Xbox 360, PS3, Wii or PC versions of Call of Duty: Black Ops will earn double XP rewards and level up. Additionally, players that haven't picked up the new downloadable content pack Call of Duty: Black Ops “First Strike can grab that for 1,200 Microsoft points, as the DLC is currently available on Xbox LIVE. The pack features five new maps, including Berlin Wall, Discovery, Kowloon and Stadium, as well as one new Zombie level, Ascension.