ncasolo:
I would say 1 Forza car is probably 10 Halo maps as far as time goes and even that number is probably too low.
I agree with you for the most part, but Bungie has many more designers then T10 does, and if it takes bungie bungie 2.5 months to make 3 maps, how is it possible that T10 could make 10 cars in the september car pack within 4 months from release date. Not to mention the peugeot race car and the 3 nissans before that. (I guarantee that Bungie makes money off of DLC, so they are working as fast as possible)
So for your statistic to be correct, T10 would need 30 designers dedicated to DLC for every 1 designer that bungie has. Somehow I think you were exagerating.
I have no doubt that T10 looses money as they say, just that cars are as complicated as you say they are (or halo maps are as simple as you say)