He is an excellent reviewer and photographer and I think his take on the comparative merits of the two systems is perfectly judged. I have used both fairly extensively too, and I have only two tiny areas of disagreement with Ming.
One related to his comments that the PCE lenses are a safe bet... The 85 clearly is but from my experience, detailed in another thread here, the 24mm is certainly not, even, I wold bet, a good copy.
The second related to DR: the D800/E party trick is shadow detail when the sliders are bumped up. I have had a look at some of my old S2 files and whilst I can't do an exact comparison, I would bet that the Nikon is the clear winner here.
But the main truth is that they are within a gnat's chuff of each other and that the main differences, aside from personal preferences of ergonomics, and price, are the lenses you use. In that respect the S2 is a very clear winner. Even the best Zeiss glass has shot-spoiling LoCas at wide apertures on the 800s.