non-gravity on 15 March 2009
http://www.gamekings.tv/index/nieuws/killzone-2-nu-al-een-miljoen-keer-verkocht/
This is the website that brought you the Killzone 2 developer interviews. I don't know if this counts because they didn't mention VGC and could have quoted another website (they didn't give the source). But the data is certainly VGC's
