Granted by his impeccable sensing capabilities; DSM Kabuto was able to effortlessly avoid the susano'o arrows as shown below in the spoiler:
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What Kabuto couldn't react fast enough to, in order to completely avoid, was Itachi's shunshin strike:
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Thus, Itachi speed blitzes the likes of any shinobi below DSM Kabuto's [top tier] reaction and perception level before they can barely move a muscle; as even Danzo [
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] and Kakashi [
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] were incapable of even weaving handseals to counter the susano'o arrow, which is inferior in speed to Itachi's shunshin. Greatest Of All Time.
Kabuto didn't move because he didn't think he had any reason to move; he forgot he had horns so he thought Itachi's attack wasn't going to land. And besides, there was a flock of crows disturbing/distracting his senses.
Kabuto didn't move because he didn't think he had any reason to move; he forgot he had horns so he thought Itachi's attack wasn't going to land. And besides, there was a flock of crows disturbing/distracting his senses.