First of all, I am pretty comfortable with the supercharger rates. I usually am not ready to move on before the car is, which is fortunate since the faster charging probably won't apply to the existing cars including the M3.
Second, I frequently see charge rates of 300 mph, so that translates to 100 miles in 20 minutes assuming the temperature and SOC (state of charge) are appropriate. Even at a more frequent 250 mph that is only 24 minutes.
Third, looking at the patent drawing, a cooling port that automatically connects to coolant accessed from the bottom of the car sounds like a problem waiting to happen, what with mud and salt spattering up into either the cooling port or the protective door mechanism. Inspecting and wiping it clean with it under the car won't be fun at all.
Finally, I think Tesla will consider these things and will come up with a good solution. I just got my MS last December, so Tesla has 4 years to figure this out before I am likely to trade up.
