To some, Cox's forthcoming traffic discrimination is an unequivocal violation of net neutrality (NN). The network is the gatekeeper; its terms of use, the law. A bit is no longer just a bit, first come is not first served, and our communication space is ever less Free.
But to others, traffic discrimination just makes sense. If the network is congested then the network has to drop some packets. Some types of traffic need speed but not throughput, while others need throughput not speed. So customers benefit when the congested network drops packets based on whether it has to get out in a hurry to be valuable.
Both views are right.

