Actually, Nikon's new 800/5.6 does use fluorite elements - two of them. This, despite previous Nikon marketing blurbs that fluorite was used long ago, but they made ED glass so they could avoid using temperature-sensitive, fragile lens elements (e.g., this link).
I wonder how the fluorite will do in a black barrel? If it has thermal issues, Nikon will be blasted. If not, it supports the idea that Canon's white paint is purely a marketing ploy (already supported by the white lenses with no fluorite, like the 300/4L IS). Either way, I see egg on the face of one or maybe both...
I was under the impression that the white telephotos were white to keep a lens' autofocus system from overheating, not the fluorite elements - going back to the early days of AF where Nikon was using focus motors in their bodies.
At any rate, I don't mind the white 70-200. In some situations where I shoot, it adds an air of legitimacy to the fact that I'm standing around with a camera taking photos. I walked around a large city in China and never hesitated to pull it out. Of course the fact that I'm white was probably a bigger deal most of the time.