Is it true that the Model S can somehow sense the current carrying capacity of any outlet it's plugged in to, and adjust the charging rate correspondingly? I know the Roadster came with pigtails that would send a pilot signal to the car's charger so it will draw the right amount of current, or it could manually be set if needed. But I've read that the Model S can somehow "sense" the breaker rating on its own. Anyone have any information on this?