Now bear with me, I know that NPD uses a similar tracking style to vgchartz but there is a rather large discrepancy between their numbers and ours.
The August edition of NPD has PS3 version of Madden 2011 at 893.6k units. Now if you add that number which is just for the US to vgchartz tracking numbers since 9/04 then Madden would be at 1,046.4k units well above the 977k listed.
However, when you consider that VGchartz had Madden's ww sales at 850k units while NPD had only the US at 893.6 you begin to ask is Madden 2011 on PS3 actually above 360 at 1.16m.
Now consider NPD had 360 US sales at 920k while VGchartz had them world wide at 1.02m. I would say that 100k WW is reasonable difference for Madden 2011.
I believe that Madden 2011 on PS3 numbers should be equal to 360's WW. Agree, Disagree let me know.
SOURCE http://www.joystiq.com/2010/09/09/august-npd-its-another-mad-mad-madden-year/








