Board Thread:Theories and Speculation/@comment-36512555-20200101053037/@comment-35409024-20200131145042

I'd hardly call Itachi reacting to Lightning a speed feat. And Kakashi did the same thing. It's safe to say Sharingan user's have that capability.

KCM Naruto and Itachi chitchatting isn't really one either.

He doesn't really have any speed feats except when he seemingly disappears and leaves a clone behind in his place before someone is aware.

All I know is Kishimoto stated he's faster than part 3 Base Rock Lee and part 3 Base Sasuke. Unless there's something that shows in the Manga or something stated later on that conflicts with that, then you can go by that.