It is my understanding, at least as far as Australian issued OWE's go, that the 10 day minimum is only for M (economy) class OWEs.

Errrmmmm..... I've just quickly looked at the rules on Fewmiles' site. It is apparently only RTWs that start in the SW Pacific that are like this. A/D class no min stay, M class 7 day minimum.

May be useful for future reference given that Australia is the cheapest place to by a M class RTW these days.