(Model units centimeters. Scale 0.1)
A simgle ball 10cm diameter placed 1m over a simple plane should free-fall down to the plane in exactly 0.45s (Physics calculation).
At 60fps this should be 27 frames.
In Blender (with simulation speed left to 1) the fall takes 87 frames; as if physics in blender work 3 times slower than in reality.
We could artificially bump the simulation speed to 3, but shouldn't the default be physically accurate to start ?