It clearly depends of your settings, with these (the default settings coming from simhub) i get a sweet proportional response :
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You can tune it by switching to gamma mode : below "1" gamma factor will make it respond later while above "1" will make it respond earlier (not your will in this case)
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Concerning the effect data on RRRE it's based on the tire grip data coming from the game.
Edit : just an example of very late response settings :
Basically raise the feedback factor, and lower a lot the gamma factor, like you can see the curve raise very late on the graph.
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