The DNS queries return NSs in round-robin, but the server order is 
constantly "ordered" in the whois display.

At 07:12 PM 5/12/2002 +1100, you wrote:
>Hello Lucian,
>
>This is not limited to AusRegistry but is generally the manner which all
>registries treat delegation.
>
>The registry is oblivious to the master/slave relationship between delegated
>Name Servers. Instead it publishes an unordered list of NS records to the
>DNS allowing resolvers to select the "closest" Name Server from that
>unordered list. Such selection is made using round tripping algorithm.
>
>Regards,
>Matt Narayan.