Net Neutrality redux

Let me state right up front that I'm in favor of Net Neutrality. I believe strongly that my contract with my ISP is for delivery of bits, and I really don't want them trying to shape my traffic based on the source for those bits. I paid for bit delivery, and I've asked for those particular bits, and I expect my ISP to send me those bits at the agreed-upon terms for speed and bandwidth. If they didn't like that contract, they should have tried to negotiate different terms beforehand.

My friend Dan has argued the other side of this on several occasions. I suspect he's doing it just for the fun of arguing (I'm guilty of that myself quite often). I'll have to ask him to remind me of his most compelling argument so that I can write it down and demolish it with vim and vitriol.