The supermarket chain came out on top with a 100 per cent recommendation score.
Locally produced goods and ease of parking push smaller chains ahead.
US consumers voted for their favourite store based on the quality of products and services.
Costo and Amazon were among the top choices for American shoppers.
Discounters are having an adverse impact on Perth’s fruit and veg market.
Only about 15% of the economy is dominated by large firms.