Hard to figure out. Dude literally disappears from sight and is able to make attacks like a... 30 metre area or something with no one seeing him. Like people are just falling down dead and slash marks are appearing on the wall at different locations. So like, a lot?
Despite this, Luffy tags him out of the move twice and straight up dodges it once as well. He takes other hits but he still manages it.
With Bellamy, Bellamy is zipping around, destroying things invisibly, taunting Luffy that he can't keep up and then Luffy one-punches him out of the technique no problem.
Blueno has the whole "WTF? I was faster than you earlier today," because he had been blitzing him less than 24 hours earlier and Luffy is like "Nah, I can just hit you and dodge you now," and does that.
Lucci, same deal. Guy was blitzing him and then Luffy is able to keep up.
It happens a lot.