In a very confined area. He mentions similar issues with Tesla's coast-to-coast autopilot ride: The software is not general enough yet to handle it. That seems to be the case for Waymo as well.
Sure, keep moving timelines. It's what makes you money in the area. I am sure when around mid-2019 hits, it will suddenly be "most experts agree that the first feasible self-driving cars will arrive circa 2025".
You guys are hilarious.