Your comment is extremely misleading. Firstly, the "couple of seconds warning" does not seem accurate. The actual report states:
"Our test drivers are trained and prepared for these events and the average driver response time of all
measurable events was 0.84 seconds."
Secondly, you fail to mention:
"“Immediate manual control” disengage thresholds are set conservatively. Our objective is not
to minimize disengages; rather, it is to gather as much data as possible to enable us to improve our
self-driving system."
Thirdly, you fail to mention that the rate has dropped significantly:
"The rate of this type of disengagement has dropped significantly from
785 miles per disengagement in the fourth quarter of 2014 to 5318 miles per disengagement in the
fourth quarter of 2015. "
On the contact events, you fail to mention:
"From April 2015 to November 2015, our cars self-drove more than 230,000
miles without a single such event."
Lastly, your comparison with human drivers fails to take into account the environment:
"The setting in which our SDCs and our drivers operate most frequently is important. Mastering
autonomous driving on city streets -- rather than freeways, interstates or highways -- requires us to
navigate complex road environments such as multi-lane intersections or unprotected left-hand turns, a
larger variety of road users including cyclists and pedestrians, and more unpredictable behavior from
other road users. This differs from the driving undertaken by an average American driver who will
spend a larger proportion of their driving miles on less complex roads such as freeways. Not
surprisingly, 89 percent of our reportable disengagements have occurred in this complex street
environment"
I don't think self-driving cars are quite ready yet, but you are not representing the state of the art accurately by making out it is as bad as you say.