EaglesEye379 on 08 August 2008
The official shipment figures for March - June 2008 was 1.3m which adds to the 19m officially announced at GDC for LTD shipments at March 2008.
Source: http://www.microsoft.com/msft/earnings/FY08/earn_rel_q4_08.mspx
This equates to 20.3m shipped as at 30 June 2008.
Its now August with 20.15m sold so I dont see whats so hard to believe.
By the way all the numbers you quoted are chart tracking sites as well which is what VGChartz is as well. Its not trying to copy them. Each site has its own independent methodology for tracking so you can only use official statements as a source for shipped numbers.
