" I'll be brutally honest, 375ml - I separate QF aircraft - I give a service to the others. "
Adamastor,
Having experienced ATC in all different parts of the world, I can assure you that Australian ATC has a long way to go. Before you start deciding who you separate and who you give a service to, I suggest you have a long, hard think about what it means to be a 'professional'.
LH