At home, I am getting "42miles" per hour of charging. When i went to a nearby destination charger, it was charging 21Miles per hour. At a super charger, is much faster, but I have not needed to charger there yet.
One thing he is wrong about is the whole wait till you get to 20% state of charge and then charge it back up to $80. That is actually not good for your lithium battery and that is the recommended charging practice that Tesla recommends because it will cause battery degradation because in the microstructure of the battery itself there is what can be described as a crystalline material and that material expands and contracts based on state of charge and they've shown that only using 20% of the total state of charge of the battery versus 60% of the Total state of charge battery can reduce battery degradation down to approximately 1/4 for the overall total kilowatts used so plugging in every night and charging back up to 80% is actually better for the battery then waiting till you get down to 20% and then charging it back up to 80% state of charge because again discharging at 60% total stated charge and then recharging it 60% Total state of charge and doing that on a regular basis will cause the chemical structure in the battery to break down faster for every 100 kW of energy that you put into and take out of the battery.