We got Tesla software version 2019.12.1.2 a couple of nights ago and I finally got a chance to test out the faster Supercharging.
I started the day out with 41% this morning and arrived at the Supercharger with 9%. It’s been a pretty mild day but I did a bit of driving, parking in the sun for several hours, drove some more, then navigated to the Supercharger for 10 miles to enable battery conditioning.
Wh/mi for the afternoon was 198, which is a bit over 5 miles per kWh or 170 MPGe. That was with a mix of city and highway driving under 70 MPH.