In further on Thursday 8 December, TT233, the 1105 from SYD down to MEL (A320 VH-VNB) took off at 1223. Arrival is likely to be 51 minutes tardy at 1341. This aircraft has been similarly late for several hours as the previous post together with this contribution show.
TT511, the 1035 MEL - BNE (A320 VH-VND) did not take off until 1150, so arrival is suggested as 55 minutes late at 1245.
Like JQ, on the busier days with tight allowable turnarounds, if a TT roster (rotations) starts off 50 minutes late, it is likely to end the day at least 25 minutes late even if it picks up five minutes here and there in an individual flight sector or on turnaround.
UPDATE: VH-VNB subsequently ran the 1310 hours MEL - SYD (TT238) that was airborne at 1435; arrival is predicted for 1523 hours, 48 minutes late. Any small gains in the total elapsed time between pushback and gate arrival have been swallowed up in longer than timetabled turnarounds.