Actually, I believe that it is possible to edit an airplane to give lowspeed torque problems. I just haven't remembered where I read the changes you need to make. I do remember the instructions were not exactly easy to follow.

I do feel that none of the sims do a realistic job of modeling the runways and such. None of the fields where I fly let a plane taxi without a bump or two that causes a problem. And the runways in the sims really miss what real ones are like.

I have messed around enough with evil handling Cubs and Decathlons to know that it's possible to sort them. Everyone I've taken the time to fiddle, and been lucky enough to have survive long enough to get sorted did wind up being no sweat models. So I guess I can believe the sims are being mostly truthful about those demons.

One thing that will always cause doubt however, is the fact that lots of the models in the sims are real ones. And are being sold very often by the same company that's selling the sim. That just about insures the sim models aren't going to show any bad habits even if the real model is a dog. But so far, I haven't seen a sim compromised that way. At least all the real models I've got that are in sims seem to be good flying real models. Which solves that problem for that model at least.