Enter: UberX. According to the website, this option of Hybrid car is cheaper and faster than a DC cab. Here is the breakdown what I have found to be the cheapest options:
So the price differences depend on a lot of variables. To me, the cost of Uber outweighs the price of not knowing if I'm ACTUALLY going to get picked up, not having to stress about the tip (every cab driver I've had loves to tell me about their families- OK OK HERE IS AN EXTRA $10 JUST SEND HER TO COLLEGE), and to be able to track where the driver is and how soon he'll be here- and now there is a smaller price gap between that and the other services! So my Type A Controlling Self is sticking with Uber, and is very happy to have it come with a cheaper option.