I wouldn't have a problem with going the speed limit.
See, here's the thing. A lot of the traffic jams are because people are hopping lane to lane or cutting people off or really just not doing enough planning about where they want to go. Autonomous vehicles would know what lane to go in and what cars are around it so it would be able to plan appropriately. No more traffic jams (or at least greatly reduced)
When I drive from MA to NY, I may break the speed limit at times, but the average speed is still 50-55MPH because of traffic. In an autonomous vehicle that goes at the speed limit, it would shave close to 30 minutes off what is normally a 3 hour trip. And at no point do I have to speed. A trip into Boston no longer takes an hour in the morning - vehicles know where they're going and you get into town in a fraction of the time.
Longer term, it means that police departments no longer have a benefit of setting up speed traps - nobody is breaking the law, no tickets to write, no additional funding. Cities get no funding from red light cameras.
So here's the real question: Is this a tradeoff that we as society are willing to make? Do we give up the ability to break the law in order to get the benefit that we wanted out of that in the first place (i.e. get to your location quicker)?