250swb: in my pics showed here, I see some areas in zone I and IX, almost no areas in zone O or X, so I agree with you on that.
But, in the same pics, you may see probably all the areas in zones II-VIII. This is what I call "better tonal shift" than when I use the standard fast regime.
I.e. the pic of procession: the taller boy's dresses show clearly the area where the sunrays hit the dresses folds, the same for the pants and the sweatshirt of the bearded guy in the middle.
I'm pretty sure if I use the standard fast regime, I would have lost most of those details, because of lower tonal shift of the negative.
You're right, I can't apply entirely Ansell Adams zone method to a 135mm film; but at least I may apply part of the Ansell Adams method to develop my negatives the way to obtain as the most tonal shift as possible (or at least I may try to).