Eidos forum admin says Tomb Raider sells 1 million copies in less than 48 hours

[Nsanity]

Saw this over on NeoGaf:

According to an admin of the official Eidos/Tomb Raider forum [+].  Not sure how to look at this figure. I don't keep track of games sales, but is Tomb Raider's so far an every-day feat now? Or is it notable compared to other games'?