Source NPD

Switch - 906k
https://venturebeat.com/2017/04/13/march-2017-npd-nintendo-sold-906000-switch-systems-last-month/

Oh my, I wonder what that Zelda attach rate is tho?

Edit: Oh my... it's over 100% for Switch... O.o

http://www.businesswire.com/news/home/20170413006259/en/Nintendo-Switch-Fastest-Selling-Video-Game-System-Nintendo

"The Legend of Zelda: Breath of the Wild game sold over 1.3 million units*. That total includes more than 925,000 units sold for Nintendo Switch and nearly 460,000 units sold for the Wii U console. That means that Nintendo sold more of this game for Nintendo Switch than it sold Nintendo Switch systems, for an attach rate of more than 100 percent. This may be attributed to people who purchased both a limited edition of the game to collect and a second version to play."

Here is a reference for those interested

First month hardware sales in the U.S. according to NPD

Switch is best opening ever for Nintendo pic.twitter.com/k1KnIiGgPd

— Daniel Ahmad (@ZhugeEX) April 14, 2017

Nintendo Switch, the new home gaming system that people can also take on the go, has sold faster in its launch month than any other video game system in Nintendo history. The Nintendo Switch system sold more than 906,000 units in March, according to the NPD Group, which tracks video game sales in the United States. That makes Nintendo Switch one of the fastest-selling video game systems of all time. Notably, this sales surge was accomplished in a nontraditional month for a console launch.

The Nintendo Switch system sold more than 906,000 units in March, according to the NPD Group, which tracks video game sales in the United States.

The Legend of Zelda: Breath of the Wild game sold over 1.3 million units*. That total includes more than 925,000 units sold for Nintendo Switch and nearly 460,000 units sold for the Wii U console.

Zelda sold more than the switch did..... lots of Nintendo guys jumping onboard in the U.s Already!

But how? lol

Wow, a game with an attach rate that's over 100%!

People probably bought zelda while they waited for the switch with the fear the game might sell out and be hard to find like the switch....

Theres another game that managed over 100%, know what it is? I'll give you a hint

Rofl Zelda outsold the console itself...on a single platform alone. 

No, just no.