I've seen the demo, yes. I wonder how much it was just nVidia's SDK talking, though.
Be that as it may, I guess my point is: I don't believe that demo was the full monty with just neural net training and a slight coat of polish missing. If it were, I might agree with you.
Frankly, in late 2016, I believe the results show that they had tons of actual programming missing. The spat with the MobilEye probably caught them a bit off guard, software-plan-wise. Also the constant personnel changes within the division are not very reassuring.
Probably today they are far more advanced now, but for me a lot of this is going through Tesla's statements in October 2016 through January 2017, and how accurate those were compared to what has unfolded and what we now believe the real status to have been then.
Not very, IMO.