I do agree, that was his fastest wrapping feat. However, we didn't know his prior location and this doesn't change the fact that he has to materialize before wrapping his opponent.
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As Obito states, "the sharingan can read moves" regardless of ones speed, it really all depends on the users speed/ability to physically react.
Gai demonstrated something Itachi could very well do here
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that's preventing Obito from wrapping him, by striking faster than he could wrap.
Considering all that, I believe Itschi could counter a kamui