Transformers 2 got crap movie reviews, yet has been the most successful movie this year. Even if ODST ends up a AA title based on Metacritic it'll still sell very well.
No one is expecting it to sell like Halo 3 are they?
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix