LittleBigPlanet is not a big budget game in anyway. It was created by a team that started off with 5 people, which then expanded to about 30. This is an average budget game at most.
Over 500K sales is all that is needed for LBP to be a success. Anyone saying less than 1M is a flop are just deluding themselves.
@FishyJoe
Bit unfair to compare a new IP to a Mario game, sales wise isn't it?