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Bitmap Frogs said:

Dude, are you aware they have direct data from around 60% of the market? Their margin of error is max. 5% - if it somehow their whole staff stimated the remaining 40% (which btw, is mostly from wal-mart and they have historical data on walmart) while drunk driving at 150mph on the wrong side of the road, they might be at a 7-10% margin of error.

They didn't "get anything wrong" - that's the state of things in the USA, and that's it.

@the source: your estimations are off as much as 50% on hardware and 84% on software - while the average might be lower, the data is unreliable as we can't predict on which titles/consoles you'll be way off. I'm very happy for the existence of vgchartz but it's clear you guys *need* to increase your direct data. The 2% you have now is clearly not enough.

Explain this then:


Famitsu and Media Create both have ~60% direct market coverage in Japan and have error margins well over 5 or even 10% and from what I understand the situation of one huge retailer not being involved (as with Walmart in the US) is not the case in Japan so you'd have thought each would be better equiped to track the remainder of the market they do not directly cover.


Personally, and this is just an opinion and in an off-the-record kind of way, looking at month to month trends it definitely seems evident to me that maybe NPD do not get all of their data in by when they have to release it. They always seem to go higher or lower on a title then adjust it back / forward the following month. 2.7m for Brawl last month seemed a little too high - especially with Nintendo saying 1.4m week one but then to drop to ~300k this month is way out of line with everything we have been getting as well as common sense in general. Vegas 2 did 750k last month, 100k this month on NPD. That is an enormous dropoff - down to ~15k a week if you assume a dropoff throughout April. Seems too extreme but then I thought they seemed very high last month. Our COD4 figures have been a lot bigger recently (Game of the Year edition gave a good boost) but they show sales dropping after being huge Jan-Feb and much higher than us.

I dunno, all just seems too random to me. Every other country in the world seems to have regular, fairly predictable sales patterns but NPD just jumps up and down fairly inexplicably. Across all our data, 360 and PS3 had their biggest weeks of the year at GTA launch and saw good increases the week before - this is true across the board. All the big analysts followed our lead in saying 300k+ months for 360 / PS3 (many much higher - we got slated for being so low if anything) and yet NPD data comes in over 100k below. I am well aware they have ~60% direct coverage and I am not accusing them of foul play but something just doesn't add up.

I'd bet a fortune that they will have huge figures for May - despite all indications to me showing that sales have dropped back to pre-GTA IV levels in just one week. Maybe we are missing a trick and for some reason all of our stores follow totally different buying trends, but I'd find that hard to believe.