User blog comment:Crazy sam10/Modern Warfare 3 Collection 3 + 4 announced/@comment-25496444-20120802162754/@comment-3140952-20120802230341

It's pretty much a fact that they are smarter. Elites will be agile, move all over the place, take cover, flank, use vehicles, board vehicles, throw grenades, charge when their health is low, etc. Grunts never charge at you and will take cover once their health is low. They also now work better in teams. Jackals never charge, in case you haven't noticed they just hide behind the shields and draw your fire to let other covy shoot you. And sniper jackals are on the map, and do keep their range. They just aren't as cheap as in ODST. AI isn't about how fast or slow they manage to kill you, it's about their reactions to different player actions. In the case of the ODST Brutes, Grunts and Jackals, they all kep their distance with large signs above their head which read: Shoot me, I won't even bother to go into cover!

Study them, and you'll actually see. One shot killing them with rockets in Rocket fight won't help, just turn the difficulty up to legendary. It's pretty much 10 times harder than ODST firefight was.