Re: I'm not so pessimistic
"Whether any one individual is a good driver or not, we put our lives in the hands of others who may be less than ideal drivers every day."
Interestingly enough, there are a whole bunch of other circumstances where people "put their lives in the hands of others" with a lot fewer qualms - such as going to a doctor, who might easily kill you without anyone actually realising he fucked up (at any rate, he has to demonstrate astonishing ineptitude to get blamed for anything - otherwise it's just "natural causes" and "complications"; no doctor ever got in trouble for not really giving much of a fuck about what actually happens to you...).
At the very least, robo-cars might exhibit wide awareness and caution, but not actual intelligence or a self-preservation instinct any time soon, which is something most but the stupidest drivers definitely do demonstrate some level of. I do believe that much like with road accidents vs. plane crashes, it won't matter whether robo-cars turn out to be safer than human drivers (make no mistake, all cars could be self-driving and we'd still have fatal accidents daily, even if not nearly as many) - most people will still fear having to trust a black box more than taking their chances driving themselves or letting a trusted person drive (if you're willing to ride with a person you don't trust well... good luck to you and congrats for the Darwin award).