A 4-6 week settlement is the norm in QLD.
Yes, this has been my experience of the expectations in Qld. Thirty days being the most common desire of sellers.
Until one asks, however it will never be known whether this property's seller is price or time sensitive.
Jerrybee, your friend could put in a 21 day finance clause and go for 60 days settlement. The reaction of the seller may further assist in defining what is more pressing to them. Bearing in mind, your comment that it's been on the market a while, they may go for a conditional contract (finance and building/pest) and slightly protracted settlement.
If this is a run of the mill type property on the Gold Coast, my observations are that the market is not slow at all. It isn't on fire by any means, however clearance rates have improved for median and slightly above median priced properties. The upper end (as Rolf has pointed out) is still slow and more amenable to seeing a conditional contract being acceptable.
It may behoove your friend to get their finance ducks lined up sooner rather than later and if this one doesn't work, there will be other properties to come on the market.
Bottom line is that your friend will not know until they ask, by putting in an offer that suits their terms and gauging the reaction. If they don't ask, the answer will always be No!