You realize lightning happens in a flash, and Minato is known as the "Yellow Flash" basically saying it resembles lightning.
You also realize, A(Fourth Raikage) uses lightning release to make himself quicker (Lightning Release being made up of, yes you heard it correctly, Lightning) which makes him nearly as fast as Minato, but not quite. So if Minato can outrun such a powerful speed that is developed initially from Lightning itself, and Naruto is now quicker than Minato...
Do I seriously have to say any more than that?