First let’s get rid of this fallacy: “ Net Neutrality, also known as “the way the internet has always functioned,” means that all online content is essentially treated equally by Internet Service Providers”
There has been no net neutrality since Google emerged as the top search engine. Content Google does not like, either for political reasons or because it does not bring in any revenue is treated differently (bumped down search listings,) than that which Google’s algorithms give a stamp of approval to.
In respect of the notion of data being delivered at different speeds, this could only relate to the rate at which the server delivers packets of information to the line. In most of Europe because we pay an ISP for internet access we get the speed we pay for, but other considerations such as line quality, line loading and propagation delays can affect the rate at which data is received.
The word free can mean several things. Free as in gratis, for no charge; or free, unrelugated and unimpeded are the ones that concern us. You can pay a little and choose a supplier that offers unregulated and unimpeded access or go for a no charge service in which the T & Cs stipulate the provider has no contractual obligation and there are no service level agreements in place.
I’d rather pay a little for as much net neutrality as is in the ISP’s control. Google will be a law unto themselves of course, until such time as we recognise that their search results are filtered to serve google’s business interests.