Very interesting - the rule is based on the exceptions.
Of course, this means discarding almost all of the recommended torque values in every service manual, hardware manufacturer's application charts, engineering guidelines, etc. in which higher values are invariably shown for 1/4-20 vs. 1/4-28, 1/2-13 vs. 12/-20, etc.
Too bad they didn't ask you before they did all that work.
