Ok I am convinced.
The attack and release work back to front but I still think your knee is the wrong way round on your diagram.. Setting to the left produces a harder more obviously compressed sound, to the right a subtler but quieter effect occurs. IMO anyway.
The reason I had the A + R working that way round in my head is that values of less than 73 used to make it distort and everyone said it was due to the times being too short!! Until Elektron fixed it that is.
Oh well...