Umm... would you mind if i debate on this topic, well i am on opposing side

! Here it goes ~
you people are assuming a very fast ninja can escape amaterasu.
But its wrong, raikage dodging it was just because of sasuke's lack of experience with amaterasu ãnd MS.
Do you really think sasuke couldn't have bothered to move his head and concentrate his eyes on raikage ?
Remember what happened to sasuke when itachi was trying to amaterasu him, sasuke had to run such a long distance, while itachi just had to move his head, and sasuke survived only because itachi didn't wanted to kill him.
Sure i agree amaterasu is not as instant as ... say FTG. But it doesn't take 1 or 2 seconds ... it is like another similar MS tech like kamui,
Let me explain what i actually mean, we know , one sec have 100 nanosecs.
So lets say, a MS user starts to concentrate on an object and tries to amaterasu it.
So at nanosec-1 , he starts concentrating, At nanosec-60 he will cast it on the user.
So yeah it is not instant, but the time gap is so small that you can say it is near instant .
(kinda offtopic) And for especially sasuke timegap can be reduced to 50-nanosec and not to forget that he can manipulate amaterasu , its called blaze release. (it doesn't require concentration anymore, once amaterasu is summoned, it can be spread instantly , like we could see in sasuke + itachi vs kabuto )