While I cannot warrant that every departure and arrival is monitored, from observation it is very rare for TG to run late into and out of Oz despite what can be its elderly "equipment." On Thursday 29 August, TG475, the 1920 hours to SYD (B744 HS-TGG) took off at 2121 so on a rainy Sydney morning, Friday 30, arrival should be at 0921, 121 minutes behind schedule.
TG476, the 1000 hours SYD to BKK often - mostly? - beats QF23, the 0950 ex SYD into BKK, but today will see the TG flight unable to depart until at least 1105 hours.