Nintendo is currently hosting their financial presentation and just stated this:
Nintendo CEO:— Takashi Mochizuki (@mochi_wsj) February 1, 2018
Switch's sales momentum faster than Wii in North America, about same in Europe, slightly less in Japan. Latest sell-through at 13M, excluding certain regions such as LatAm, parts of Asia
When the herd loses its way, the shepard must kill the bull that leads them astray.