I know some people were debating this prior, so I thought we could have a thread.
For reference, that'd be about ~20%.
Source: http://www.gamespot.com/articles/halo-5-star-wars-battlefront-assassins-creed-syndi/1100-6432535/GameSpot said:Bartel went on to say there is no reason to believe Halo 5's digital sales were higher than what they were modeling, based on conversations with Microsoft. "We are in constant discussions with all publishers and platform-holders and we believe that all major full-game titles launched in this quarter were in line with previously announced digital download levels," he said.
"We are in full understanding and full belief that there is no game that was launched this quarter that was materially above a normal digital percent at launch."
For reference, that'd be about ~20%.