Maybe, someone confused production aim with shipments?
That's 5m more than 3DS! 3DS was being sold at 249$ for its first five month and it wasn't selling very well, Nintendo had to slash its price ( 249$-169$ ) for the sales to skyrocket,
Well, some wii lapsed gamers should return, both casual and hardcore but not that many to reach such an overly high number for a non sony console.
Casuals are on the free to play mobile gaming, ... For the lapsed hardcore wii gamers which are multiplatform owners, switch price is prohibitive for the moment.
I think it's hard for that number even with a Pokémon game!
And for the first year switch will be selling as a wii u successor and by extend wii, gc, n64, snes, nes, to say that this number is feasible since it's a hybrid!
Handheld consoles gamers will be waiting for the handheld ips, a price drop, or a switch more portable ( cheaper/durable ) revision that will properly replace 3DS, that can't happen in the first year because 3DS isn't dead, both software support and hardware sales-wise.