I agree with all the arrogant part but calling it a joke is probably too early. Self-driving is a very hard problem and expecting miracles is just too much to ask.
I guess my "joke" comment was from the perspective of investors putting in upwards of 3mn angel round.
But more importantly I am just happy about the fact that somebody who believes in open-source is taking up the project. Self-driving cars are a distant future and can only be accelerated when a lot of eyes see what is happening. OpenAI is most likely the product of the same ideology.