i m not talking about the meteor ......i just explain that no matter how madara fast is , its want effect itachi and same to madarak but I don't understand how being able to see the meteor with a sharingan will help itachi and nagato get away from it. And if its madara vs itachi in taijutsu or something, madara also has the sharingan so it will come down to who is faster.
But anyway debating madara is hard because we haven't seen his upper-limit so we can only go by hype.