So...how bad is the deadzone using a flightstick?

[Steiner]

I'm using the Ace Edge flightstick and noticed that the Spitfire has a bit of a dead zone, not bad, but noticeable. However, when compared to the Mustang I can tell that the P 51 is much tighter with only a small amount dead of zone.
With the Mustang when trying to draw a bead on a FW 190 I would generate PIOs until I turned down the elevator and aileron sensitivity by about a third and viola! ...almost no more PIOs.

Based on what I observed in the demo I'm going to venture a guess that based on performance levels, different airframes may have different dead zones profiles in an attempt to mirror real world handling characteristics.
Just a guess.