@kop: FFXIII-2 is out on 15th December, so a little less than two months away... not 28 days for sure :P
About Mario: it's true that Comgnet is NOT a perfect science, but there are some events, some peculiarities about certain games that tend to repeat themselves, and to be even bigger under certain conditions.
For example, main Mario series: they tend to sell more than what Comgnet preorders say. And since at the beginning of the life of a console, there aren't lots of customers preordering games (install base is growing), we can expect to see a even stronger version of this trend with 3D Land.
However, we have to see where it will end: now, it's following kind of a similar pattern to Galaxy 2.
MH3G so far is VERY good, guys.
It isn't even so far from MHP2nd (430-450pt), and that came out in the third full year of PSP on the market..