Tabular on 13 June 2013
Looks like there was a spike in Xbox One sales as the system was shown and immediately went available for preorder at a few outlets. As I said "it's not an indicator".
Since showing their box and giving a price Sony has regained top spot.
"The Sony PS4 preorder page is firmly in first place on [Amazon]s list of best-selling video games. The Xbox One falls to second place"
http://www.ibtimes.com/ps4-vs-xbox-one-amazon-splits-playstation-4-preorder-page-may-not-ship-release-date-due-high-demand#
