Agree, its a totally fallacious argument. My experience with pyro developers only spans a year, but I've printed negs developed in ABC, PMK, and Pyrocat-HD on several major brand VC papers from several of the popular films in formats from 35mm to 8x10. In several cases, I've done comparisons between a Pyro neg and the exact same shot developed in Rodinal or HC110. The pyro neg exposes and prints differently but what else is to be expected?
Taking print exposure and development times from a chart? Who's touting that method? Sounds like a misapplication of something intended for an automated processing line.