Hi Robert, I shoot Delta 100 in 120 roll and 4x5. It is a nice film that works well for me in Rodinal, PC-TEA (Gainer's Phenidone/Ascorbic Acid developer) and Pyrocat-HD. It has been reported by others to work well in the Ilford Developers and D76.
Delta 100 does not respond well to N+ and N- development. If you are into that mode of photography, you would be happier with Ilford FP4 or Efke 100 IMO.