Thread:DazzlingEmerald/@comment-25152698-20141211170148/@comment-4080775-20141211171330

Actually, you are wrong: this may say:

The user is able to form rifts within the fabric of space that allows them to instantaneously transport themselves to different locations.

It says instantaneously because is can get the user from one place to another in an instant, not in the sense that the technique is activated and deactivates instantly. If that were the case, then Obito would've had absolutely no time to sync his kamui with the dimension and travel through it.

Kamui will never be instant, because the user has to take time and decide when and how they want to use it. Naruto has been show blitzing Kaguya, when he took her arm off, that feat was faster than Kamui in itself.

I'm not arguing, i'm just stating that a lot of people get confused in how kamui is instant. Genjutsu is like the fastest casted technique in the series. Itachi can point at you and bam, you are in genjutsu, but if Kamui was truely instant like you say it is, then it wouldn't leave the opponent no time to move.