Gamezine: Killzone 2 has been patched to version 1.2. Minor tweaks have been made to the controls.
Some have complained that Killzone 2's controls are "plagued" by input lag. Some say that it is a deliberate move by Guerilla Games to make Sev's moves feel realistic and weighty. I personally think they are two different issues.
The latest patch includes a few minor tweaks to controller input.
Some forumites are saying that the patch has improved the supposed input lag, including the removal of the controller's deadzones (there used to be a delay before turning around.)
Update
[UPDATE] - More reports are coming in that the controls have been improved, but so far our information is limited to the multiplayer controls.
[UPDATE 2] - The control tweaks have apparently also been made to the single-player. Any changes are minor and do not impact the feel of the game. The changes might feel like an improvement to those who were adverse to the controls before the patch.