I wondered if anyone has tested to see if there is any efficiency difference between the two modes? I.E. does driving in ludicrous mode in a gentle normal driving manner use any more energy than driving the same way in sport mode? It seems that almost everyone I know that has a performance model, drives in sport mode, and when they want to get "ludicrous" they switch modes and then back again. This seems counterintuitive to me. Logic would seem to dictate that if you just left the car in ludicrous mode all the time, you would have the extra power that you might want when you need it instantly, instead of bringing up a menu and then going into ludicrous mode and back. It would seem to me that even if you are in ludicrous mode, but are driving normally, you would use the same amount of energy as sport mode unless you really stepped down on the fun pedal? Of course if you wanted to enjoy FULL POWER, you would still have to initiate "max battery power" and wait for the batteries to warm up. But I'm not sure how much more acceleration you would achieve with max battery power over normal ludicrous mode. I'm sure your butt dyno couldn't tell the difference, and I'm positive you couldn't put a stop watch on it to tell the difference either as your reflexes can't react quick enough. I would think the only way you could tell would be to run either 0-60 or 1/4 mile times with and without max battery power enabled using timing done with electric eyes as it is done on the drag strip?