I have done the wait list thing in the past and have *never* received a notification email. If you are waiting for a specific device to become available, make it a point to check the Google store several times per day.
I deliberately ordered the silver/white Pixel XL within 15 minutes of go-live, having mostly bought black phones in the past. My Nexus 6 was grey and my current 6P is silver/aluminum however it has a totally black face (the areas above and below the screen).
Having had some time to re-think my decision, I am not sure I will like the white face on the Pixel XL and hoping I did not make a mistake by going with this color. If I wasn't so anxious to receive the new toy, I might even cancel the silver/white and order a black one, but that would probably add a month (at least) to my October 26-28 delivery date.