Board Thread:Theories and Speculation/@comment-36512555-20200101053037/@comment-24824859-20200101214531

Rallo Tubbs wrote: he kept up with kcm naruto, in edo tensei form, while holding back. he was able to whip out his susanoo fast enough to tank kirin, Itachi keeping up with KCM Naruto is not at all impressive since Naruto was the one who was holding back while only wanting to talk with him. Not to mention, Itachi didn't have control over his body.

Sasuke's Kirin was extremely telegraphed considering he saw the dragon emerge before Sasuke signaled it to come down. So Itachi having Susanoo up is also not that impressive.