I'm not sure why you're referring to it as antiFUD, who is the FUD coming from?
Good question! As JoshRoss says, it might really come from all over, but I cannot help but feel it's mostly Microsoft developers who lead the "HTML5 will be ready in 2022" charge. After dreaming of a C# future, they pray for Bill G to come back and show the world what E^3 (you know, embrace etc.) should look like