Email and web traffic can tolerate significantly higher latencies, for example.
Bullshit. You don't know which of my traffic is higher priority. The end user can and should have network management tools, but the ISP better damned well not decide that my kids watching Nemo in HD is more important than my rsync transfer of a log file telling me why the master server just barfed. That is my choice, not the ISP's.
Similarly, almost everyone agrees that ISPs have some responsibility to control network performance in a manner that guarantees the best service for the most number of people,
Bullshit. Just, bullshit. Citation needed. No, people who understand networks do not believe that the pipeline providers should be doing traffic prioritization based on endpoints.
or that prioritizes certain traffic over others in the event of an emergency.
Vague fear mongering. What if the network companies prioritize the wrong things in their search for a little more revenue and something bad happens to the children? THINK OF THE CHILDREN!
These are all issues that a careful set of regulations could preserve while still mandating neutral traffic treatment in the majority of cases, but it's a level of nuance that most discussions of the topic don't touch. The larger and more serious problem with net neutrality as its often defined, however, is that it typically deals only with the "last mile," or the types and nature of the filtering an ISP can apply to your personal connection.
I don't know if this is intentional or not, but throwing piles of vaguely related and confusing facts at a story then saying, "Therefore, we shouldn't regulate now!" is a standard tactic from the Koch plalybook. Shove it.
The public, including tens of thousands of network administrators, have spoken without equivocation: We want net neutrality. Period. When the ISPs come up with better regulation, they can propose it, and we will consider it. Until then, we will not move an inch on our demand for Net Neutrality. It has worked since the first day of the Internet. It is why the Internet made so many people, including the ISPs, rich. If they don't like it, they can GTFO or DIAF.