Thanks for bringing the article to our attention. among other things, it confirms the good points concerning the Michael Smith Amidol formula.

Having no experience with desitometry or step wedges and the like, a couple of elementry questions: does this indicate that D-76 offers better shadow separation and worse highlight separation than pyro? also it seems to say that pyro offers an ability to capture a longer brightness range (in the scene) than D-76. Do I interpet that right?

Also do you know what film Bob used? My experience with Berrger indicates it is fantastic with pyro but not so good with normal developers such as HC110 and XTOL. I never tried it with D-76 though...