I just found out that my positive impression of the Nikon 400mm f2.8 E FL was not just a form of buyer's remorse. 
It has just been measured by lenscore as the second best lens available for 35mm cameras.
http://www.lenscore.org/
Cheers,
Bernard
That is a pretty nice testing site, thanks for sharing.
It's hard to say "best lens," because it depends on what you're trying to do with any lens, but the Nikon 400mm earned the second-highest overall mark, true, but its overall usefulness is very limited.
The Zeiss Otus 85mm won the highest overall mark, which is in line with all the accoladed, with the Canon 200-400 earning the highest marks for super-tele zoom lens (as well as zoom lens of any kind).
Brand-wise, Zeiss lenses won 5 different categories overall, as did Canon lenses, with Nikon earning 4 categories.
In fact, the Zeiss 85mm Otus and Canon 200-400 were the only lenses to earn 2 awards.
Jack