On my international flights, they have always boarded GS/F and then 1K/C. The GA has never made 1Ks wait to board until C is finished..

As far as long haul Y, I took two TPAC Y trips last week:

SFO-SYD
purser never came over to say hello
I did not receive an express pass for SYD Customs (FAs told me that they were out, and then another FA passed by my seat, with a stack in his back pocket )

SYD-SFO
purser never said hello
Nothing special. I did notice several pax in Y receive drinks in glasses, which made me wonder if they were GS..