As I said in a recent weekly sales thread, I feel like the Switch's dominance in Japan distracts folks from just how much it's kicking arse in North America.
It may not be crushing the competition quite as spectacularly in the weekly charts there, but it's still selling incredibly well.
According to Daniel Ahmad/Zhuge, 13 million of these sales are in the USA, which is very close to PS4's sales in the same timeframe.