Michael, I agree with what you say. From Leica Fotografie International 4/2000 p19, Erwin Puts states that the latest generation of T-grain and Core-Shell films are less compatible with the sharpening effect than classic films APX 25 and 100, Kodak Plus-X or Ilford Pan-F+ and Ilford FP4+.
Thomas,I am approaching the question not particularly from the point of view of making good photographs but rather from the point of view-here is an old process (acutance film development) where the old films are no longer available and the process has been lost-or has it?