The layout in the article is on a split ortho keyboard and I think this is the best arrangement for a modern keyboard. What I think is not so obvious is, that the staggering makes traditional non-split keyboards bearable, because it allows to touch type with both hands at a slight angle. At least this is true when using the European fingering. In the US version the number row is awkward to type with angled hands.
I see this sort of thing repeated and I always feel compelled to disagree. I'm sitting here typing on a mono-ortho board and I can choose to angle my wrists or not angle my wrists. That part has nothing to do with the choice of ortho or stagger.