Sink Rate
In a few days the FDR data should be available.
In the two previous FedEx MD-10 gear failures one was the result of a vendor error on the gear boss plating, and the other was a higher than design load sink rate. The sink rate of these incidents was ~ 2 and 14 fps respectively
One could expected the investigation to turn one in one direction or the other once the touch down parameters are known.
The MD-11 tail plane / pitch control system is significantly different than that of the MD-10, and nether of the above MD-10 incidents are related to the MD-11 landing incidents.
.. Due to the statistics of small number it easy to infer correlation is present were none is existent