nen-suer on 20 May 2009
Scott Steinberg, VP of Product Marketing at SCEA, added that the game is the
highest-selling SCEA PS3 title for the first 30 days out of launch.
...............................................
So yeah they did say it 
http://www.joystiq.com/2009/04/09/killzone-2-has-speedy-run-to-500k-sold/
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