The castle demo uses fixed rate logic and tweening. This is the same thing that the Gaffer article uses I think. But I notice in the castle demo they aren't multiplying the movement by a dt which is a bit puzzling.
What I really need is for the game to run the same physics at 15 fps or 1000 fps.
What I really need is for the game to run the same physics at 15 fps or 1000 fps.