[MetalMilitia]

Yeah a lot of people have been having performance problems. Apparently it's being worked on for the next patch. Though even with optimisations I still think it'll be a CPU/GPU/memory hog because of the huge amount of detail in the maps.

The other thing is I can't imagine much gets achieved in the demo as everyone will be inexperienced and it takes at least a couple of weeks of consistent play to find your feet in this game. To find good team-mates you'll probably need a full version (though even the full version is full of tossers).