Um perhaps its due to the fact that its often overtracked. The worst example was last december when the wii was overtracked by nearly a million!!
With vgchartz numbers the rule of thumb is
Wii you need to minus 10%
Xbox360 about right
Ps3 you need to add 10%
All bow to me the VGChartz current reigning 3DS prediction champion
Bet with tbone51: Pokeon X & pokemon Y will not sell more than 8 million in 2013
jarrod said:The Xbox360 or ps3 will not sell more than 75million units
July 2009 daveJ said: True the wii has a large lead now but by 2017 the most likely result will be 1. ps3 2. xbox360 3. wii <-- wii's successor launched in 2011 effectively killing sales of the wii
2009 daveJ said: The wii will not break the 50% marketshare barrier it will go below the 40% marketshare barrier though in the future. VGChartz members: Impossible, youre an idiot that knows nothing about sales