Gunslinger....
I can understand exactly what you are saying, I'm a bit confused though, on how you tell whether you are 'expected' to win. Let's say I'm playing a Pantheon game, 4v4, and seven of 'em are AI's. The mix of AI's is pretty important, when the other side has all Assassins and your side has all Generals, for instance.
Are you saying that a Win % can be meaningfully calculated in this scenario? (ps. I know that SOUNDS sarcastic, but it is not meant to be 
I do remember somewhere on the board saying that AI's are left in the Pantheon, so that their performance can be evaluated.
--Ken