Microsoft has manufactured 700,000 copies of Perfect Dark Zero for the U.S. market, with a target hardware tie-ratio of 1:1. Veevaert said that figure was based on the early launch period of the hardware, and that a further run is expected in the days ahead.
http://www.next-gen.biz/index.php?option=com_content&task=view&id=1662&Itemid=2