Unless I'm mistaken, the Pixel 1 blindly accepts whatever pubkey is embedded in the kernel, but displays the warning screen on boot if it's not Google's pubkey (to clarify, not a click-through screen, just a temporary splash screen). I guess yeah it's technically Verified Boot, but if it just accepts any key you throw at it, then the security guarantees are a lot less. You can't tell it about your pubkey to get the scare screen to go away, and you can't tell it to block other keys to get the security guarantees.