I dont understand, do you think on this?

https://www.resetera.com/threads/pr-switch-surpasses-wii-in-best-selling-nintendo-console-in-us-on-bf-cm-115-hw-over-2017.83690/page-11#post-15458548

While Iwata did not give specific dates, he said the sales were measured over a seven-day period that included both Thanksgiving and the so-called Black Friday for U.S. retailers, which is the traditional start of the holiday shopping season and when retailers rack up their biggest sales of the year.

https://www.reuters.com/article/us-nintendo/nintendo-says-wii-ds-sales-strong-idUSTRE4B720D20081208

 meaning the wii comparison doesn't make sense.

Comparison invalid ... 

Along with the specific dates not given from the figures Iwata had released, the length of the sales comparison is different too from 7 days to 5 days ... 

All we know is that the Switch is the best selling Nintendo console in US history for the five day window (Nov. 22-26) ... 

It can be reiterated that the figures for the best selling five day period for the Wii in the US remains unknown ... 

This has never been done before by any company giving a LTD for a console. people  seem to ignore that nintendo was very clear and detailed with the number. there is no reason for them to do any math, when the data they have will show a clear LTD, but anything is possible although extremely unlikely. Good thing is we will find out very soon, and people should not be surprised when they match numbers giving by Nintendo. 

• Lifetime sales of Nintendo Switch, which is entering only its second holiday season, have reached more than 8.2 million units.

I'm so confused

Well those same 5 days period for Wii would be very strong in any case (Wii had crazy sales) and Switch having best those 5 day period and better than Wii means we talking about strong sales in any case for that period.

Also like RolStoppable wrote, Looking at VGC's estimates for Black Friday week in 2017 (472k) and taking NPD results from last November into account (770k), it seems reasonable to assign ~400k to the five-day-period in 2017. So if 400k is the base value and sales grew by 115%, the result is 860k.

We also know that Switch had its best week in US, meaning that beat even launch Switch week in US.

Thats a PR, and Nintendo already had some weird PR statements before, so it wouldnt be hard to imagine they focused on sales for that just 5 day period and just add that to LT numbers (including October) and thats why they said "more than 8.2m", and that versions fits most when you calculating numbers. Also, have on mind that even with that more than 8.2m we comparing Nintendo internal vs NPD numbers.

Wii was hot item and most likely very supply constrained those 5 days, compared to switch, so it's most likely wii got most of it's 800k on different days since it doesn't specify the and just mention 7 days with black friday and thanks giving included, knowing how hot the wii was it probably impossible to find those days.

 what Rolstoppable   wrote is  speculation nobody knows what switch did last year during those 5 days last year, it could be anywhere from 270-400 that's something we will never know, what we do know is nintendo gave a LTD for switch in the US, and it nintendo have never giving a false LTD in the US before, or a LTD for the US with missing numbers, it has never happened before, i don't see any reason to doubt these numbers and not trust Nintendo.

I don't think I could've said it better myself ... 

Also what suddenly happened to being excited about Nintendo releasing Switch data ?  

Whether the c word is real or not, data trumps all bias, haha ... 

Given that Nintendo reporting has been precise within 100k this generation and that Iwata's figure sounded like a rounded up conservative overestimate along with the fact that we still don't know the daily distribution of five best days on the Wii during the 2008 BF week, there's a plausible scenario where Nintendo's currently released figure adds up ... 

For all we know the daily sales for the Wii would've been nearly uniform during that week at ~114K/day which would've totaled ~571k while the Switch could've sold a total of 600k which would still be consistent with Nintendo's claim regardless while on the previous days where the Switch would've averaged ~15.8k/day ... 

A possible weekly breakdown of sales could've went like this: Week 1 - ~110k, Week 2 - ~110k, Week 3 - ~423k, day 25-26 - ~240k 

The above scenario highlights that it would've been consistent with both Nintendo's claim of Switch having the best 5 days in the US compared to the past systems and meeting at over 8.2M units sold in the US as well ...

NIntendo has one weird statement  in the last decade and that's mario kart attach rate, which is totally different then giving clear LTD numbers. what's the chances they  got it wrong again, basically slim to none.

See my above post and I've already outlined the issue with the Wii since were going off of make belief numbers when we have no idea on which 5 days were the best for the Wii nor do we know the figure for that either ...