Board Thread:Naruto Discussions/@comment-26403664-20160228225013/@comment-3965545-20160420005204

That was with Hag's special chakra gift in his system. Naruto had that same special gift at that time too. No proof he was going as fast as he can either, he simply figured out Sasuke's warp range and got out of it(mind you he figured it out in seconds)

So back on topic, just because its later in the series and characters are older, does not mean they are as strong as when they each had half of Hag's special chakra from him personally in them. It also does not mean Itachi is weaker or slower or anything. You NEVER saw him serious and fighting all out, you also NEVER saw him with real intent to kill or intent to defeat no matter what.