Seems like Sony announced 9 million consoles sold.
http://www.ibtimes.co.uk/microsofts-phil-harrison-xbox-one-kinect-ps4s-success-hats-off-sony-1455080
Quote
Asked about bridging the gap between the two console's sales figures (Sony report 9 million units sold, Harrison says Xbox One's figure is "north of five million")
*The 9 million figure was mentioned by Edge in the question directed at Harrison.
http://www.ibtimes.co.uk/microsofts-phil-harrison-xbox-one-kinect-ps4s-success-hats-off-sony-1455080