Then Kakashi being exhausted would have an affect on his reaction time, is also hypothetical isn’t it?
Kakashi talking about a completely different sequence there, than the one Kakuzu crossed him up.
Madara’s barrier construct isn’t formed instantly, neither is Gai’s attack.
Madara reacts to Gai’s speed multiple times, it’s mot that complex either, there are so many examples of this, did Gai get slower or something?