It would be a good read to have a satisfaction survey of our courier services. Fastway provides very inconsistent services to Eltham. If I know a vendor uses them I give first preference to vendors that do not. Businesses should be interested in using reliable not just cheap services, but they are usually insulated from the delivery and non-delivery frustrations at the customer end.
I doubt a test is practical but a questionnaire including satisfaction, costs, reliability, reviewer location, and accurate tracking would be useful if there was sufficient response and geographic coverage, especially as AusPost seems to take longer and cost more every year, and many business are migrating to courier services.
There is a related thread