Rudeofus,
My comment was not directed at you.
I'm just saying to Michael don't write off high resolution scanning as useless simply because nobody has evaluated its ability to distinguish different developers yet.
It could be done on DPUG using say Perceptol, Xtol and Rodinal.
It's probably not as good as the enlarging method but potentially useful if anyone makes a homebrew to test.
It has not been evaluated yet.