The name "Throttling" is an attempt to frame this pejoratively. All ISPs of every type engage in bandwidth shaping / QoS. Its the laws of nature that enforce this (demand always is greater than supply of every resource).
“There’s no evidence that any of these policies are only happening during network overload,” said Choffnes. “They’re throttling video traffic even when the network doesn’t need to. It happens 24/7, and in every region where we have tests.”
That's not QoS, that's greed.
If you can’t give people 25Mbit connections with your wireless technology, don’t sell them 25MBit connections.
But coincidentally typically the stuff where the ISPs have all these terribly difficult problems are the services that refuse to pay their extra fees. Kind of like what happens to restaurants that don’t pay the protection fee.