Kodak found that early PPD developers were affected by the acid used to make the salt, and converted to either the Sulfate or the p-Tosyl salt which you see in use today. This is true to the present time in CD-6 and CD-3 for example. The chloride had varying adverse effects on early Cl/Br emulsions used in print films and papers. I don't know what all was affected, as the change was complete when I joined EK.
As for a standard sensitometric test, the pAP developers were not in use by the end of the war, and at Kodak they used an Elon + Ascorbic Acid developer called internally EAA. I do not remember the formula.
My military manuals from the 50s do not describe any developer such as the one above nor does any Kodak manual. They basically describe Metol + HQ developers with 50 g/l or so of Sodium Sulfate, and that is the reason I asked the question.