Discrimination based on content type or a similar metric is a different matter.  I think some discrimination is warranted - my personal opinion coloured by the fact that I don't like to sit for 5 minutes while my web page loads piece by piece because Netflix is making money off my neighbour.  And yes, a small decrease in overall latency IS worth it for a significant decrease in average latency, especially for time critical applications.

Using the electricity analogy, this is like charging more for power at peak load times, a common practice that can benefit the majority of users.

-Dan M