Ranking is a function of how hard the field is, and in Adelaide the field is softer than the eastern capitals. Fewer competitors are spending money on search, the cost of competing for a term is lower, and the businesses that do rank often have older, slower sites that are easier to overtake. For a company starting today, that gap is the opportunity. It closes over time, not all at once.
The growth of the Lot Fourteen and Tonsley precincts is already changing who you compete with. Tech, defence and research firms setting up there tend to arrive with money and marketing sense, and they will not leave the local search results alone for long. A medical practice in North Adelaide or a builder working out of Glenelg is not competing with those firms directly, but the general standard of search in the city rises as they invest.
Our honest read is that the businesses who benefit most are the ones who start while the market is still forgiving. Getting to the top of a suburb search costs far less before three other firms decide they want the same spot. Starting now is cheaper than paying for a rescue job in two years.