@material preset "lightness":
There were some changes that have (most likely) not yet been merged to the Cinema 4D builds (as it is being developed by the Max team).
However, for non-metals, the users are encouraged to play with the values themselves, the presets are there to give a general idea about the color. This is still under discussion internally and some changes might appear.
For metals, the users should maintain the values given in the preset as they are physically correct and computed from a complex ior.
Thanks,
Jan