What makes this crumble is the fact that Gai had to pause and use a hand seal to use Hirudora (Bottom)
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. Yet Madara only reacted after it was executed meaning he had quite sometime to act unlike against the normal kick and punches Gai instantly throws.
Let's not use this bad excuse "He could if he wanted to" that's been on for time and time again. We see Madara cut down Minato like nothing...We see Madara try to kill Gai by throwing the TSB at him shortly after that. Zero reasons for anyone to believe Madara could if he wanted to but just didn't or whatever despite there being couple movements before Gai makes his next physical attack. Gaara's surprised face and reaction at Gai's speed should indicate this...He states "His movements aren't human" which was solely in reference to his overall speed. Same thing he said to Lee when he used Hidden Lotus while Lee was just moving alone
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. However you people attributed it to his Taijutus alone even though we know the clear indication would have been made if that was the only case. Just like how Karin referenced Ay's movement against Sasuke.
Oh and if you're going to use "He was V1 against Madara"(Even though he got blocked) then factor in the difference between Edo and Juubi Madara in terms of speed is far far above the difference between V1 and V2. Besides Madara is a sensor and was surprised before Gai got there..He was fully surprised before Gai came due to his speed fully backed up by Gaara's reactions. No one cares about an old statement that was made when new feats>>>old feats. Many times have we seen characters show better feats that the old ones.