The concerns over delivery mileage stems from ICE vehicle days. In most cases vehicle manufacturers had very specific parameters about how the car was driven in those early miles (don't go above 5,000 RPM for the first 750 miles, etc.). Those parameters were suggested to extract maximum longevity, performance, and efficiency from the gasoline engine. Tesla clearly doesn't have any issues with getting their engine piston rings to seat properly, and they don't need to worry about metal shavings in the oil at the first oil change! As such, the only potential issues IMO are cosmetic. Did anyone physically damage the car in any way during the 70 miles it was driven (chip the bumper or windshield, leave a nasty odor in the car, run something over and damage a wheel or tire, etc.)? If you look the car over and there isn't any physical damage, then say thank you and enjoy it. If someone did 1,000 sequential launches from a dead stop to accumulate those 70 miles, then I'm sure that would have put some strain on the components...incredibly unlikely though. Most of the people I've spoken with at Tesla service centers already own and drive these cars regularly. It's not a big novelty to them at this point, so I'd like to believe they're probably not just hooning around in every car that passes through the facility at every opportunity.