Interesting link, but I take issue with the psi/area thing, and also the 19.1mm @ 80 and 120 psi tests seem to be botched with wildly varying results that the wide rims didn't suffer.
P.S. The bar graphs comparing patch profiles are- perhaps inadvertently- quite deceptive, having the appearance of greatly magnifying the differences between standard and wide rim contact patches. Even when you take the numerical values into account, the bars' proportions are hard to ignore.