Updated sales numbers from NPD via GAF (Forza, Demon's Soul, Rabbids, etc.)

[mrstickball]

Kasz216 said:

Xelloss said:

According to the dude at Sega who was the manager in charge of developer relations for segas publishing wing, NPD undertracks by 30%.

Interview is over at 1up.com, their 4 guys one up series.

If they undertracked by 30% nobody would use them.

Well, chances are that NPD gets some numbers wrong, some of the times.

When your tracking the market like NPD, VGC, FADE, or any one else does, your always building a very incomplete picture of the market, even with 60% of sales covered like NPD does. So there exists the chance that NPD, VGC and others can be wrong. Obviously having more sample data helps, but in the end, your still prone to faults and failures because each store, each data point, can work differently.

I'd say in general, though, NPD is most likely within 10% of actuals for all retail sales. VGC is closer to 20%. However, both do adjustments. Ever wonder why we've never seen NPD offer LTD sales data on a monthly basis with their NPD Top 10?