I was actually thinking about this after my visit to the Santana Row event and my cross country trip. I figure for my daily driving not much will change as I only have a 20 min commute so the electricity I burn going 75 MPH will easily be recovered every night. But on long trips I can definitely see my driving changing, especially because there will be a point where driving faster actually gets you there slower since you will have to recharge more often. I'm sure someone far better at math will be able to tell us what that tipping point will be. But I wonder does anyone else see their driving habits changing after they get their S?