There was a time.... Had occasion to take a 172 into Mascot. Called inbound at the reporting point - the racecourse? Got back a question - 'What speed can you maintain to touchdown?" Got the meessage, height to lose and full throttle gave me "120 kts" "Right, track direct to RW xx, maintain 120 kts, take the first high-speed taxiway. You are following a DC9 and I have a 727 behind you".
Never happen now.