This is an annoying style of argument from Wayland fans.
Wayland fan: You need to switch to Wayland. X is deprecated and has been for years! Wayland is the future.
User: Okay, I tried, and it's broken/worse.
Wayland fan: No, you don't understand, Wayland is just a protocol. It's your implementation of Wayland that is at fault, not Wayland itself! Wayland is still great!
User: But X was working fine...
Is this some kind of Pavlov's dog reaction? That's not what my comment was about, and even if it was it wouldn't make any sense anyway as KWin had good results in these measurements.