This is the only report coming from Nintendo in response to January NPD numbers:
Wii U software sales increased by 16% over January of last year. Pokemon X and Y sold more than 125,000 combined units in the US in January, bringing their total sales to more than 3.25 million in the United States. US Super Mario 3D World sales reached 655,000 in January, and The Legend of Zelda: A Link Between Worlds sales hit 715,000.
There's no; 3DS/WiiU was the best selling dedicated game system for this month/hardware sales of WiiU/3DS are up __% over January of last year numbers anywhere to be found, which would be in the report if that was the case. So it most likely means the opposite, sadly. In my prediction in another thread i mentioned how Nintendo could regain momentum if they where able to follow the 3DS strategy of releasing 1st and 2nd party retail exclusives on a monthly basis. After February Nintendo Direct, it became painfully obvious that won't be the case.