Halo 3 ODST over or under 3.1 million for september NPD

[Seece]

Squilliam said:
It launches at the end of September so I don't think so. It launches the 27th I believe. It would have to sell more than Halo 3 over the first few days.

Nope, September 22nd, giving its first week 4 days and its next week also 4 days. So it has 8 days worth of sales in September NPD.