Well, here's what I learned in the demo:
* I tried to shoot some random guy, but missed. He ducked behind a corner and threw a grenade at me. He missed. We played hide and seek between the houses for a while, until I saw him running towards something through my sniper scope. Instead of shooting him, I followed him. Know what he did? He noticed a tank. Yeah, a tank. He climbed in and blew up the house where he last saw me. Problem is I ran around the various houses until I found myself behind the tank, ran up to it, grabbed the barrel, climbed onto the tank and dropped a grendade into the cockpit. (or whatever you call it.) And that's a -random- enemy. Now that's AI.
* The demo mission have you enter a facility to chase down a Queen card. Sounds fine? Well, I didn't bother. I ran the other way and expected to find a natural "end of demo zone" or something. But no. I kept running and eventually found myself in a small village, complete with villagers and -two- vehicles, both with a gunturret and some guy operating it? In a demo? And that's not mentioning the civilian cars, or the enemy outpost I had to pass first to get there. And again, that's the demo version.