Does not matter how fast the internet goes, we all want more speed.
No two places are the same.
The problem is that today we have in Australia seven different nbn connections and your internet speed depends on what connection you do have, how many people are on the internet in your area and the distance that you are to the fibre cable. Now it is slowly getting to be only fibre as most of the copper is gone.
If you want to know what type of internet connection you actually have and your options click here.
If you want to test your internet speed click here.
As a rule, I would say that a modern business needs a broadband download speed of 40Mbps (megabits per second). What you need to check is a few times in the day as it changes eg morning, lunchtime and evening.
We had a client that tested their connection and then they complained. It was discovered that some of the internet wiring was corroded, and once that was fixed the problem went away. So it pays to check.