You should have a look at Patrick Malandain GPS data from his consecutive 100 days with 100 km/day in a row from Feb 18 to May 27, 2016: https://connect.garmin.com/modern/profile/ultrapatrun
Better comparison wrote:
Good work on the histograms but surely we need a comparison with a transcon or similar length 'run' by a known/trusted ultra guy, so we can look at the run-walk distribution of his effort? Not his regular training (or sub transcon racing) where he is probably 100% running.
I did not do the exercice, but his pace distribution seems to be distributed around a running pace of 8min/mile, with not more then about 10% time spent to walk. RY "performance" seems bleak in comparison ;-)