OP, just thank your lucky stars that the flight took off.
I was happy (WAS being the operative word (at one time)), to fly JQ.
I knew they were sometimes late, and sometimes did cancel flights at short notice.
But if they knew, in my case, a flight would be cancelled 24 hours prior, they should have sms that info to me, instead of just as they did in my case, by blocking OLCI for my Aust JQd flight.
24 hours prior, they already knew!
At the airport, I tried kiosk check in, nope, still couldn't.
Spoke to a JQ girl at MELd T4, she said come back a bit later, so I went to the QP in T1.
2 hours prior, got an SMS, nearly missed it, thought that I heard something, decided to check, and yep, my JQd flight indeed got cancelled.
So I had to come donw from the QP, and go to QF service sales desk to buy another QF tix.
Went back through security and nearly forgot/left my phone at the security checkpoint.
NOT HAPPY JQ.
If you get a sms that your JQ flight is cancelled, and you need to run from QP at MEL T1, pack all things into HLO thus making sure you don't have a chance to loose it. Including iphone/mob phone/ipod/everything!
Yes, I do realise that all airlines might have delayed flights or cancelled flights, but JQ in my case should have informed me earlier.