My experience is just the opposite.

I have had 7 large parcels delivered from Victoria since mid July.  Five of them arrived within 6 days and the tracking was updated within 10 minutes of delivery.

The last two were slower.....9 days after buying I received a card in my letterbox to say that they were at the PO.  When my OH went down that afternoon it was the wrong card...for someone in another street and the PO swore my parcels were not there.

That evening MyPost sent a message that the 2 boxes were at the PO but as it was Friday we did not collect till the following Monday.  The tracking had been updated before my OH arrived home with the boxes.