I remember reading this somewhere but Linkin Park's Hybrid Theory is the number 1 selling debut album of the decade. I also read that Linkin Park is the only band left that has all their records hit #1 in the charts. (Not sure how this was calculated, but it seems pretty true. Article might have been referencing only active band left to release #1)
I think it was this way. The best-selling debut album of the decade was Norah Jones - Come Away With Me, it's also on that list below me. Look at this, it's about the best-selling debut albums of all time: http://entertainment.ie/music/feature/Top-5-best-selling-debut-albums/201/4830.htm
Not a whole lot of albums have gone diamond since 2001, so it's a big achievement one way or another. Frankly, I think those awards should change to reflect the times.