Apparently Astral Chain is sold-out both on Amazon and for some retail chains, I wonder if this affected the physical sales, certainly if it's sold-out Nintendo didn't expect it to sell this much which is a good sign.
If that's true, then there's a chance that the game will be comparatively leggy as new shipments come in. On the other hand, this can also result in just an increased amount of digital sales. I hope it gets a mention in the next Nintendo investor's meeting with some shipping numbers.
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454