Many people have been saying it for months (kowenicki especially) from Nintendo's latest financial report. I don't remember the exact number, but I think it's overtracked by around 200k.
Read my original story on Fictionpress (Shinigami Twin): http://www.fictionpress.com/s/2996503/1/Shinigami-Twin
As well as my other one (Hell's Punishment): http://www.fictionpress.com/s/3085054/1/Hell-s-Punishment
Nintendo Network ID: kingofe3