just looked at this article, and while its a bit of a reference perhaps, its just plain goofy that he doesnt say what he weighs, and or mentions if his "experimenting" to get to his recommendations on his chart are only with him (at an unknown body weight) or with some gear also (unknown weight)

I suspect that its him only, but again, the fact that he doesnt put his weight unfortunately shows that despite the good intentions, its not really a serious article in terms of giving a proper indication for folks like you wondering about pressures.

It is interesting that his max recommendation for 26x2 inch tires of 45f and 50r is just a bit higher than what I used on my trip, albeit with me at 135 and 50lbs of stuff.