Update, according to the UGO Gameblog, one of the control settings is very simmilar to Call of Duty 4, however the couch button has remained R2, which seems weird.

So I just finished the Killzone 2 Demo. The following was my though process as I played the game.
1. Starting the demo – “Holy shit the graphics are lovely”
2. Taking my first step, and killing my first Helgan – “Holy shit these controls are terrible, how am I not dead”
3. Trying to change the controller setup – “Why do none of these control methods make sense”
4. Trying to find the button mapping for the controller – “wait, I can’t change each button to something else?”
5. Finishing the demo – “This looks so good but if only I could actually play”
6. Opening up Call of Duty 5 – “Thank god you have a intuitive control system.”

Seriously, I don’t know what the developers were thinking when they decided it would take holding L2 to lock onto some cover, the left stick upwards to peek over the cover, Holding R3 in to aim (whilst moving to actually move your sight) and R1 to fire.
That’s 4 buttons to preform a simple action.
As opposed to pushing X to duck behind something, pushing X again to stand, Holding L1 to aim, and Pushing R1 to fire.

Picture from UGO’s gameblog

Don’t get me wrong, this game looks beautiful but there is no way I’m going to shell out money for something that is a chore to play.

ps. I regret playing World of Warcraft.