Regarding Kizaru's performance he's about what I expected
A speedster that's pretty hard to get a good hit on
I wasn't too sure about his durability/endurance going into the fight though. Now we know he isn't up there with Kaido durability/endurance wise but that was pretty obvious
Luffy didn't knock him out but he did deal pretty good damage based on the "give me some time comment" and to be fair Luffy's phase punch had Kaido on the ground for a short time as well.
Not too bad... definitely below Kaido though. Need to see a bit more from him so I know exactly where to place him
Right now I have him solidly below Kaido but I can't say much more than that