In Europe, most train operators offer some sort of compensation refund in the event of large delays. The amount offered and the minimum delay vary between country and operator, but generally a delay of an hour is enough to get something, and two hours to get a decent amount of your ticket price back.
Do CountryLink offer something similar for long delays? Only the CountryLink train I was supposed to be getting has broken down and the delay for the replacement bus is set to be 1.5-2 hours...