I think there is an obvious reason for the high demand of the Warmonger release. Every single person or reviewing site that has a physics card is jumping at the chance to actually use it. 

Thus far they have only seen demos of the technology and I'm sure they are all waiting on actual game-play using the additional physics ge-whiz-bang card instead of the usual pointless tornado in the middle of a level throwing crap around for no reason or walls exploding into 10,000 pieces after being shot by a pistol pointless graphics shenanigans.

I actually find that quite funny; I never thought the demand for Warmonger would be so high on release, should be interesting to read the feedback and see if they learned from the mistakes in Cellfactor.

I'll get around to trying the full game over the weekend.