QF494 last night was a 763, and i've found that plane finder and flight radar both don't display 767s, which explains why it didn't appear.
As for the JQ flight, 50 minutes in the air isn't all that odd, usually they can do it in an hour or less. I'm sure with no traffic in SYD and a more direct track onto final for 34L could very easily allow the flight to land at 2252.
Jeff, if you don't already, I recommend matching the radar up with the Sydney tower/app frequency on liveatc.net, brings even more hours of entertainment!
