The $10 download hit PlayStation 3 and Xbox 360 on March 19, tempting players with four new multiplayer maps, including one dedicated to the popular Nazi Zombies mode. Details on a PC release are said to be "coming soon." nope
In comparison, Infinity Ward's only map pack for Call of Duty 4: Modern Warfare took nine days to break a million. However, that pack saw a staggered release--Xbox 360 first, PS3 two weeks later--while the WaW maps hit both consoles simultaneously.