From what I've seen it seems to update at random, though it does seem to update within 24 hours of new numbers being posted, just my observations though.

Switch hardware sales in NA are almost as much as Japan.  The Monster Hunter series has definitely taken hold in NA.  Also, Switch sold almost 750k this week and is still down 6% YoY.  It's starting to look like March is the new Christmas.

Wow, Switch has a pretty decent lead right now.  I know that NDS for 2007 is still going to be tough competition all year, but it really is amazing to see how well Switch 2021 is doing.  It has over 1m lead on 2020, and there were lots of weeks with shortages last year.  It really looks like 2021 is going to outdo 2020.

NS is on fire!
PS5 good, but it pales in comparison.

Switch is having another fantastic year to the extent it's gonna have the best start to a year ever for any console, PS5 is gonna pass PS4 soon and Xbox Series X/S is continuing to build its lead over the Xbox One by selling not that far away away from double the same week for an increasing amount of weeks so each is doing well to varying degrees. I think this could end up being the first time in gaming history where each relevant console maker ends up doing better than last time which would be cool. Usually for one to do better another has to falter but both the PS5 and Xbox Series X/S doing better than their predecessors would be good for the health of the market so hopefully that happens.

Switch really out here going to have the best year for a console EVER in it's 5th year. If it can get the best Q1 like that, it will do well in Q2 enough to not lose it's lead. No matter what happens, this holiday season will be bigger than last year. There will be a revision or a price cut and i will die on this hill. They will get the price down this year i swear. Last year's holiday was kinda underwhelming and stopped the Switch from doing 30 millions. This year, it will def get a better holiday quarter. Knowing next year will have strong software as well...

Yea i don't see the Switch not getting best selling console of all time now. Idc, it's early but i just see it happening now. Unless Nintendo pulls the plog super early, i really think they will manage to do it.

All-Time Console Sales List:

1) PlayStation 2 (PS2) - 157,680,000 (155,000,000+ according to Sony) Mar. 31st, 2012

2) Nintendo DS (DS) - 154,900,000 (154,020,000 according to Nintendo) - Dec. 31st, 2020

3) Game Boy (GB/GBC) - 118,690,000

4) PlayStation 4 (PS4) - 115,271,202 (114,900,000+ according to Sony) - Dec. 31st, 2020

5) PlayStation (PS1) - 102,500,000 (102,400,000+ according to Sony) - Mar. 31st, 2012

6) Nintendo Wii (Wii) - 101,640,000 (101,630,000 according to Nintendo) - Dec. 31st, 2020

7) PlayStation 3 (PS3) - 87,410,000 (87,400,000+ according to Sony) - Mar. 31st, 2017

8) Xbox 360 (360) - 85,800,000

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9) Nintendo Switch (NS) - 82,422,894 (79,870,000 according to Nintendo) - Dec. 31st, 2020

The Switch has now toppled the 82 million mark and rapidly approached the 360. 

Switch is insane. Baseline over 400k and big launch is 750k. Assuming this year new model + holiday BotW2 & Pokemon launches, Nintendo is definitely trying to outdo the hardware peak from last year! Switch should most likely pass Wii and PS1 in December.

I was hoping for an 800k week but close enough I suppose

Yup, NS is going to outsell Wii this year. PS4 next year. 

I was hoping for a 14 million week. Colour me the most disappointed on this forum!