This is certainly a Google press release. On a meta level, what I find interesting is that when Tesla makes what is also basically a press release, few point that out. People just take at face value Tesla's pre-recorded demo videos, etc.
What Tesla makes is not just a press release, but a fully production car that's in the market TODAY which you can buy TODAY with all the necessary hardware already in place. All that's left is the software, which they are currently working on. Has Alphabet/Waymo got actual production cars on the market with the necessary hardware in place?
And these "pre-recorded" videos show an entire trip – from multiple camera angles – of what we're told is entirely production hardware, not a hacked-together mule loaded up with a pile of sensors on a roof rack. Is Alphabet/Waymo testing with production grade hardware built into a car at the factory?
That video has exceptionally high production values indicative of a carefully stage-managed performance on near-empty streets with exotic hardware that's never going to be used in any consumer car. I don't mean to diminish Google's achievement, but it's hardly the same as actually shipping hardware to customers.
Waymo is down to 1 emergency disengage for every 5000 miles of driving, and that's a far more suitable metric for progress.