PSP launched on a Sunday. Vita launched on Saturday. PSP launch week contains 1 day worth of data, PSvita launch week contains 2 days of data. Launch week is defined as the launch period before the week ended. 

Here is an article if you want http://andriasang.com/comzfc/ps_vita_sales/ 

Main point: PSP: 166,074 units (covers just 12/12/2004)

Further Note: Also unlike IGN, that actually used 2X that number to show PSP doing better. The first day sales typically are higher than the second day sales. (Edit: My point being IGN method isn't the best either.)

Here is a link to the IGN article: http://vita.ign.com/articles/121/1215186p1.html

Edit: also sorry about poor grammar, playing skyrim and typing here. 

Yes I understand first day x second day sales, I was just wondering why famitsu said it doubled without noting the date. I saw the Japanese article and didn't see that specific date listed.

And yes, I also know it's logical to look at the sunday vs saturday, but unless I see something on paper, I hate to assume.

next prediction is 1m by end of 2011... ^^

I predict 5 million WW by the end of 2012.

That's umm really conservative. I say 8-9m.

Now you all are being too liberal!

I say 2 million by the end of 2012.

7-8million by the end of 2012.

Can someone link to the launch lineup of games in Japan and in USA/Europe respectively?

Which game in the launch lineup is the biggest in JPN? Also do we know how much Uncharted Golden abyss sold?

Could it reach 1M? Surprised if so.

I'm guessing you meant 2012.. goddamn trolls everywhere