See it any way you want, I have seen various reports of pros dropping Nikon due to various dislikes with the D4 yet not one doing the opposite because of the 1DX.
Nobody who has used both says the Nikon super teles are in the same league as the Canon MkII's, the Nikon 200-400 is loved and hated in equal measures by different pros, it seems subject distance is an important factor in the use of the lens, if your shooting fits in with the lens focus sweet spot then you like it, if it doesn't it is a soft, expensive, slow, POS.
So far the Canon 200-400, though having a gestation period longer than a comatose elephant, has had nothing but glowing reports, including from some very Canon critical shooters.
But I really don't care, sports shooting takes less than 5% of my time and I don't own a 1DX or a 200-400! The thread was about RAW files and the 1 series ability to dig a bit deeper in them.