In my experience, never experienced actually on KE (although indeed very limited experience with them, maybe 2 flights max till today).
For me so far CI has been very consistent in greetings ST E+ pax on longhaul flights (or actually any flights operated by longhaul planes) - although my experience here has been when seating in the PE cabin (even when the cabin is used as Y class -for the HKG-TPE sector).
On AF/KL - very seldom even as a FB Plat.

Cheers!