I agree, it can be trimmed hands off - that is, no stick force required. I guess my question is more about inertia than about stability. A body at rest tends to stay at rest, and neither the DCS P-47 nor the F-18 model that very well. It's sort of like balancing on top of a rubber ball. And I do agree about fly-by-wire. The F18, for example, was designed to be aerodynamically unstable for maneuverability, with inflight stability maintained electronically. But in the real world inertia is not a fly-by-wire function; it's just there. It has to be modeled into the sim.
The NASA report is interesting. Doesn't sound like they were very impressed with the machine. How soon they forget.