Speed or bandwidth?
This is the heart of the problem. We often talk about whether or not the Internet access is fast. This suggests that the important variable is speed. But the speed of information in the cable is in fact roughly the same between optical fibre and copper cable. About 75% of the speed of light in a vacuum.
For a given amount of information, it is not the speed at which it comes from the server to your home that counts. It is the speed at which the information arrives. In other words, the speed that truly counts is the speed of loading the page on your computer, not the speed in the cable.
Imagine that water is information and you are interested in receiving as much of it as possible. Between a 2-foot wide stream and a 100-foot wide river, the river will bring you an incomparably greater quantity of water per unit of time. Even if the water in the stream is faster than the water in the river. It is the flow and not the speed that is the variable that explains the quality of your internet connection.