Wii U sold over 425,000 units in its debut month – or, at least, the seven days of it counted toward NPD's November sales period (the Nov. 18 launch through Nov. 24).
"Wii U is off to a tremendous start in the United States, is essentially sold out at retail and has cemented its status as the 'must-have' product this holiday season."
Nintendo 3DS sold nearly 540,000 units and has now sold nearly 6.5 million units life to date. Additionally, Mario Kart 7 became the second Nintendo 3DS game to cross 2 million units sold in the U.S.
Wii sold 420,000 units and has now sold more than 40 million units in the United States alone.
Nintendo DS sold more than 370,000 units and will cross 53 million units sold life to date in the next few days.
Xbox 360 debut month: 326k (Nov 2005)
PlayStation 3 debut month: 197k (Nov 2006)
I thought the Wii U was underperforming? 
