just now installing for me as well. 8 days after Verizon put the notice on their website. I still find it odd, since I used to get it within hours of the announcement. Same delay with the 8.1 upgrade.
Not just this one, but are updates in general really slow to install for anybody else? I started the update an hour ago, and I'm about halfway through "step 2 of 2". It's a 56 MB update, and I just ran a 75 Mbps speedtest on my home wifi...
If you go to apkmirror.com and install the google play services beta this is the link to the version for pixel and pixel 2. Once you install this click check for updates and it will appear like magic.