Motorstorm: Pacific Rift has already sold 1 million?

[bugrimmar]

Well according to this site, it has only sold 250k.

But according to http://www.gamesindustry.biz/articles/motorstorm-pacific-rift-passes-one-million-sales, it has already sold 1 million.

Now I'm sure somebody is going to come in here and say "it's 1 million shipped", but I'm not about to believe that there's over 700k units in shelves.

So what am I supposed to believe?