From a developer's standpoint, coding an algorithm to create par times is a LOT easier (and seems much more symmetrical and therefore (?) more reasonable to most people) than gathering winning times by class and distance, cleaning all the dirty data, and generating figures based on real world events rather than algorithms and formulas.
I think anyone who ever questioned Quirin's pars (extrapolated from the average times of a single grade, and possibly a single distance) and started making their own pars understands that quite clearly. Specifically, reality is not as neat and symmetrical as some par charts indicate.
None of which should be construed as a criticism of Dave Schwartz's pars--I have been making my own pars for many years so I am not familiar with the processes he uses to create them.
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