Tax returns in the US is in february.. it's usually the third best selling month in the country. So it probably affected sales all month long. Also, a lot of big releases over the past month certainly helped as well.
Yeah, but the boost I'm talking about is just for that specific week, not the entire month. Next week last year PS4 was down to 230k again. So there must have been some big release that day last year.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454