Please don't tell me you just said that there isn't a speed increase. Have you forgotten even just Lee vs Gaara? Lee's speed was through the roof, even the wiki mentions over and over about speed increases.
Lee's main speed improve came from removing his weights on his legs. Of course there is an actual increase in physical body strength, which as a result increases speed in certain ways as well. Like when you use your legs to jump, run, etc., however, just running,
no character can obtain speed on the level of the raikage.
What is mentioned at the wiki is probably quoted literally from the databook or something. It is not to be taken so literally, and besides it is user made..
It has partially been proved. That teleportaion thing Mabui used. You would be ripped apart by travelling so fast. Raikage could, because of his shield. The speed which Raikage can move with, can only be obtained with a certain shield. Then we have Naruto, who has the kuybi cloak as a shield. Idd it appears some "cloak" surrounds the user of the gates, but it's
not chakra.
Minato of course uses a 3rd different method to move even faster than the above mentioned, but enough about that, I made my point, why I have my own beliefs. If Gai was truly moving faster than A, don't you think it's weird Bee didn't comment it? Or even Naruto?
Noting even suggests Gai has moved as fast as Naruto. Even AOE attacks from Madara hit him. So I really don't see it, unless you suggest he is unskilled at dodging :/