According to Sony's post on the US PS Blog, Uncharted 2 has sold 3,5 millionen units worldwide.
So could it be that here on vgchartz some numbers are missing or are those 3,5m just the shipped units?
http://www.vg247.com/2010/02/20/uncharted-2-has-sold-over-3-5-million-units-worldwide/