The Uber drivers I have asked have also all been very positive. I asked one whether he was dispatched by anyone else, and he said that he used to be, but no longer - now he was Uber-only and he was glad he could ditch the dispatcher model.
The guys that own their own cars are not Uber employees - they can sign up to be dispatched by traditional radios instead (or as well). So, from my sample in NYC, Uber is way better than existing models for the drivers.