RAAF have had the luxury of being able to get access and support very quickly from the USN and USAF, so their acquisitions have been painless.It may also be because the RAAF has proven itself to be far more astute at selling its requirements to government than the other two services.
MB
They also have had the capacity as a result to get production assets so minimised delay and reduced the risk accordingly.
as a result, when they get to the gate reviews its a home run event more than a "do not go past go" scenario - and when you rack up 3-4 of those in a row, you've already dealt enough good hands to get treated differently by central agencies. IMO anyway