Current SIA policy (for 777, not sure about the 744) calls for gear down, flap 20 at 2500', and flap 30 at 2000' to be stabilised by 1000'. It used to be 500' lower, but the FDAP was showing too many unstabilised approaches. Bear in mind that if it's in the morning, the guys have been flying for 7 1/2-8 hours through the night before making the approach, and often will be making their first approach at that airport. The route network on the 777 is huge - I have averaged about one trip per year to each of the Australian destinations, so most of the guys will not be as comfortable as the average domestic Aussie pilot at your airport, and will probably prefer to err on the conservative side.