Well they never said about it being in March, just that it would be delayed to early next year. So it's basically on a 'When it's Done' timeframe right now.
It's 2kgames, so I'm surprised it hasn't already been released. Those guys will ship out anything, regardless if it's buggy or not. I suppose being a big title on 360 though, MS are gonna be strict and not accept any old crap.