Billjw on 06 January 2013
From this report to others regarding digital sales it seems safe to assume, for the time being, digital sales make up 20-30% of total sales. So, taking physical copies sold of recent games released and are available digitally and using a multiplier of 1.2 to 1.3 should put you in the ball park of how well a game is really performing. Unless they begin monitoring digital sales but I doubt because transactions are done internally and doesn't get scanned at a third party retailer who are being monitored by tracking agencies or whatever.
