I would also agree that based on the advertised "140 miles in 20 mins" that this is the area of the curve that you see the highest rate of charge and the curve isn't flat.Why? Based on what?
If it was a flat curve, they would advertise a better number (i.e. 10-80% in 31.5 mins). I think they could still surprise us, but I think that 20 mins isn't a flat 180kW, but 200+kW to start and then dropping down to below 150kW.