FWIW I have recently been greeted on flights as a lowly SL. Once was when I was op-upped to J on HKG-ORD, the ISM came to greet me. Another time in Y on the same route, SP from Y came to greet me and offered to take my order for the second meal (I was sitting in the first row, so I got served first for the first meal), but did not offer Evian.
In general, YMMV with greetings... I personally don't care at all.