Well, I cancelled with RoadRunner and booked with Sherpa Auto Transport.
https://www.sherpaautotransport.com/
The reason I cancelled was RoadRunner still has not assigned a carrier and the pickup is due on Monday. What I didn't know with Roadrunner (first time shipping a car for me), is that the pickup date was not guaranteed. It appeared that way online but somewhere in the small text I'm sure it said it wasn't. When I would check in with them to see if this was going to happen on time or not, they basically told me they'll keep slipping the date until they find a carrier.
So, I called around and got a few different quotes. Sherpa actually called me to chat about this and I learned a lot. They can see the "job board", which is all the jobs out for bid right now, so they could see my job out for bid with Roadrunner. He said they (Roadrunner) have the job out for bid at a price that is too low, so nobody is picking it up right now. For example, of the $1700 I was going to pay Roadrunner, they were only going to pay the driver $1300. If there wasn't much work this week, I am sure someone would pick it up. However, there seems to be plenty of work and the Sherpa rep gave me a price based on that real time data, so the bid can actually be competitive with other bids out there and someone will actually pick it up.
So, cancelled with Roadrunner (didn't cost me anything because they hadn't assigned a driver yet) and booked with Sherpa. Sherpa did not think highly of Roadrunner and thought that some of their stuff was gimmicky. For example, I paid $100 to guarantee a top load on the trailer but Sherpa tells me, as the broker, there is absolutely no way to guarantee that. He said they could request it but it's up to the driver and their route/loads ultimately.
So, if you want your vehicle within a specific time frame, you'll need to pay more to make it happen. The cheapest option isn't going to work unless you have some time on your hands. Sherpa adjusts their quote based on what you tell them. So, if I wanted my car picked up on Monday, they can see what the highest paying job is right now and then they would put my job out higher than that, to make it attractive and give it the best chance of being picked up right away.