Nintendo don't release digital sales numbers, even NPD don't get them. So it's guess work. Don't know why they don't release them when pretty much every other publisher does.
Really? I've never seen any publisher release digital sales figures. I've only ever seen them release shipped (including digital) figures, which Nintendo do as well, and sometimes a digital % (albeit of revenue rather than actual units sold).
Bet Shiken that COD would outsell Battlefield in 2018. http://gamrconnect.vgchartz.com/post.php?id=8749702