Should Nintendo start panicking and try something crazy? Or should they be patient and see if Smash and Mario Kart can breathe new life into the Wii U?

Thoughts?

yes, definitely. sony really needs to fix this whole supply issue or they are doomed.

mmm no?
actually thats a good ratio for WiiU.
Means is gonna end around 30M

PS4 should outsell  WiiU by 4x or 5x every week and it would be normal

Not really, its the beginning of the year sales which means all consoles are selling worse than they should imo

No, the PS4 is doing ok wait till japan

PS4? Forget PS4, Nintendo needs to work hard just to get the Wii U to sell at GameCube levels.

I also have the feeling those VGChartz Wii U numbers for the US market are overtracked. 

I think it's Microsoft that should be more worried. In Europe, PS4 sold more than 3x more than the One. US, which is MS's territory, is pretty close, but this week the PS4 outsold Xbox by a considerable margin. Microsoft is also losing in the UK, where the 360 had a serious advantage over the PS3. I'm somewhat confident that Xbox One will eventually win in the US, but week after week, the confidence slowly diminishes.

What would bring you to that conclusion? They were substantially undertracked last time compared to NPD. 

MS is sure to win US juste thanks to Halo (and Gears) ! But the gap between PS4/One will be very small (compared to the 15M gap PS3/360).

'Time to panic' was about a year ago, and they did, in their own way, by showing games like FE x SMT off long before their release date. I'm also going to presume that's when they greenlit that Dynatsy Warriors game because what the fuck.