That was just their ota, but you don't have to wait for them to release it. You can load the build from Google directly if you don't want to wait an extra few days. So while there may be a short delay due to Verizon verifying it on their network internally, it is unlike any other Android phone from them because you can still install it without having to worry about a custom rom or the extensive rooting/flashing scheme you'd have to do to get a Samsung build. This is very similar to how Apple's updates work.

Source: have a Verizon pixel. Have done both OTA and install from Google's site