First paragraph tends to let me know the writer is a little loose on thought processing, he's stating the D4 & D4s are improvements over the D3x rather than the reality, the D4 & D4s are improvements over the D3s, so I get the impression the Lad is a bit confused right off the Bat.
The fact that he's trying to compare two Cameras developed 3 years apart is another point for confussed journalism.
I personally think the D4s looks to be a pretty reasonable Body for Nikon, it's what Nikon should have released instead of the D4, they didn't, and we have the situation where Canon's 1Dx took a lot off the Nikon Market in this area of Sales. What Nikon have embarrassingly done here is finally develop a Pro Body as good as the 1Dx, 3 years later, probably something Nikon should remain quite about. I'll feel the same way about Canon when Canon finally bring a +36MP Body to Market, 2 to 3 years after the D800.
I love the comment on the 1Dx inability to take sharp focus when the operator hasn't locked focus, now I see why so many of my own Images have been out of focus at times, amazing piece of deduction on the writers part, don't lock focus, end up with blurry Images, new stuff, love it.
I suppose I was expecting Nikon to bring out a D3x type upgraded Body, I owned one of these (D3x) once upon a time, and thought it a remarkably good Camera, certainly in most areas better than my 1Ds MK III, but the 1Dx ?? I feel it's probably got about 2 to 3 years before it's something I'll look at and feel I need to upgrade, it's a wonderful mix of IQ/Speed & the AF system is matchless in todays Cameras, including the D4s. Be nice to shave some weight though.