I bet controller users like you get a bonus to compensate the shitty input device
There's actually a lot of debate over at
Assetto Corsa Forums over input devices, FPS and percieved input lag, some of which I've experienced personally and some of which I can't really discern any noticeable issues.
I can say that the throttle response in Assetto Corsa is still not there for those of us on older setups (such as a Momo). Cars don't seem to have realistic throttle response so you really have to feather the gas a lot more than I'm personally accustomed to.
This is in fact a known issue that has been patched a few times I believe but there still is a little work that needs to be done IMHO. I'd like even throttle (and braking) response throughout my pedal travel and so far it doesn't seem to be there yet but it is much better than it was a patch or two ago.
You have to remember that the game is still Alpha so there's a long way to go and hundreds of issues to get past at any point in time. This being a simulator, it will likely see a much longer development phase and a ton of tweaking once there.
I wouldn't be surprised to see Assetto Corsa follow the same development cycle as say ArmA 3 from this point on.
