Quote Originally Posted by Ludens
CA has repeated their intention to improve M2:TW's A.I. several times, and they even recruited a long-time MP player to assure that this would work. The first M2:TW development blog was dedicated to the battlefield A.I.
The battlefield AI could still be inferior to MTW eventhough better than RTW. I would say 2:1 odds should be virtually a certain win for the AI all other things being equal. This is how it is in MTW using the Samurai Wars mod.

Quote Originally Posted by econ21
They would evade contact, use the Parthian shot, charge any infantry that turned their backs to them, quickly mob isolated units etc........I'm pretty sure it would not have happened in STW or MTW.
There is no Parthian shot, but the STW/MTW AI is very good about charging units that have turned their backs. It also does not charge stronger units unless forced to, but will instead try for an indirect attack in a situation where it's obligated to attack. There is less need for the AI to mob a unit because it makes winning matchups, but it will attack single units with more than one unit if there aren't any other enemy units in the vicinity.