Except your analogy is wrong. And it's why most people don't understand Net Neutrality. Netflix's packets don't weigh any more than Crackle's or Hulu's.
Just as a truck's molecules don't weigh any more than those which comprise a motorcycle, but in aggregate streaming video is a much greater contributor to network congestion than browsing a web site or accessing gopher. If you are saying that streaming video should be treated the same much the same way as all trucks pay the same toll, then I do agree with that.
There is no congestion at the moment Comcast is just exercising their right of non neutrality.
Well, unlike most internet service providers like AT&T, Verizon, or TWC they actually don't have that right -- they gave it up as part of the NBC Universal purchase and acquiring TWC will expand their required net neutrality over those customers as well.
Comcast approaches Netflix and tells them "You wouldn't want something bad to happen to your packets now would you? We can protect your packets from harm on our network if you just pay the protection fee." Netflix resists but finally caves and pays the fee. All of the sudden your video flies faster than you've ever seen it before but Comcast hasn't upgraded anything on their network.
Nice story. How about this:
Netflix pays InterCo, a backbone provider, for access to the internet, including Comcast's network. InterCo doesn't give a crap about Netflix's traffic or their customer experience -- InterCo doesn't serve end users -- and sees Netflix, which consumes 70% of internet traffic, as a network killer that negatively impacts their ability to sell mostly empty fat pipes to the rest of their customers. Comcast and InterCo have a peering arrangement where neither charges the other for access to their networks -- InterCo gets access to Comcast customers, Comcast gets access to the rest of the internet.
So Netflix says, "Why are we paying all this money to a company that doesn't even really want our traffic?" and so they go talk to Comcast directly about connecting directly to the Comcast network. They work out a deal, and now they don't need to pay as much to InterCo because it's only running traffic for non-Comcast customers, and they are able to give Comcast customers a much better, more controlled experience.
Who is losing out on this deal? InterCo gets to better manage their traffic. Netflix gets to better serve their customers, and Comcast gets to trumpet that Netflix is better on their service than it is on Verizon, AT&T, or other competitors.