Oh and this should be in General Discussion. Just a heads up.
Well as for calculations, I never count on them entirely. I try to find as many speed references as possible and then scale up or down from those depending on the character. But if you want my opinion I always felt Bleach had the highest average speed, but One Piece has high and too tiers that are faster. I never felt that Naruto quite added up to the other 2 speed-wise other than their Jinchuuriki and strongest taijutsu practitioners.