I also saw that triangle shaped plot and had the same thought. I read a great paper about this recently [0] with some of the same examples as the link in the parent, but going a little further in depth.

I originally got on this topic when reading Bayesian Methods for Hackers [1]. I am still hunting for a good method to correct/compensate for this when I am doing these types of comparisons in my own work.

[0] -http://faculty.cord.edu/andersod/MostDangerousEquation.pdf

[1] - https://github.com/CamDavidsonPilon/Probabilistic-Programmin...