What do you mean? We are intentionally tracking higher as we believe that the actual figures are a fair bit higher than NPD are reporting, after talking to Microsoft. Maybe stores not tracked by NPD are doing particularly well on 360 sales, maybe their extrapolations don't work as well for 360, maybe Microsoft are lying to us , maybe our data is wrong.
But I think NPD are tracking particularly low over the last 3-4 months on DS and 360 sales for whatever reason.
As the aim of our figures - as has been stated many times - isn't to "match NPD" but to "reflect reality" then I personally think these comparisons are often quite unfair and meaningless. But TheSource choses to do them as if he didn't somebody else would and we may as well get in there first...