I keep wondering about the batteries in the cars being delivered now. Almost two and a half years ago The Tesla blogs talked about batterys getting 8 percent more efficient (and cheaper) every year. Do the Roadsterss being built 2 to 3 years later have 2006 technology batteries (How to you order something old like that? Do you ask for cells from an old batch number? Are they prebought all sitting in a big pile in a warehouse? Do they use the old spec?) or has Tesla simply slid in the progessively better batteries without telling anyone and take the credit for increasing mileage with slick PEM work? If Tesla is not using the new batteries, why not? If they are then why not say and why not brag about an increase in distance traveled?