@parados,
No, I argue that there are other forces at play than just gravity.
First- the Moon was in orbit,
second- it is an iron ball,
third- the impact zone was of much softer matter, even sedimentary,
fourth- electromagnetic forces further slowed the impact.
When it did impact, the force was multiplied by the spring tension of the folded tectonic plate, which may be quite immeasurable...