I should have made myself more clear; RAS to CAS Write Delay indeed works and many of us use it to shave down 32M and 1M times to an extent. Note that the jump from .907 to .750 doesn't come from tRCD being reduced; rather from tRP and/or RAS to CAS Write Delay being reduced.

It's got my interest piqued though, wish I still had some fatbodies around now.