I'm on record that I'm not a console FPS fan. I like my FPS with a keyboard and a mouse, because the DualShock's analog sticks are a clumsy input mechanism for twitch shooters. UT III was the first FPS I spent any substantial time with on a console, and then it was simply due to the fact I already had a BlueTooth keyboard and mouse to run on the PS3.
Well, I grabbed the demo of Killzone 2 from the EU PS store the day it went up, and I didn't experience any issues with the control scheme or input lag. I bought KZ2 Friday afternoon and spent about 10-15 hours with it this weekend, and I still don't perceive any problems. On the contrary, KZ2 feels like a dream come true to me, because it is the first console FPS where I feel like I'm finally under control and can hit what I aim for and not have the end of my gun go whizzing by my intended targets. The "heaviness" of the game and its acceleration rates are fine for me. I still don't feel any controller lag or unresponsiveness, and I'm not seeing an issue with the deadzone on the sticks either.
I would be disappointed if GG changed the controller timings to appease the COD fans that want another twitch shooter. Twitch shooters are a dime a dozen. Kudos to GG for trying something different.
KZ2 has lots of flaws (Sev's camera height, no user defined button maps, the terrible ally AI, a story that has so many holes Jerry Bruckheimer wouldn't film it, and the part how Radec is not just cloaking, but literally teleporting in the final battle, is incredibly lame), but controller response is not one of them.