What if the 70 delay is just an enticement to get people to go P90 on their X orders even if their need is 70? I have to guess they would build 70 models earlier if the orders for the fully built up models is not large. By making you think you can get it eaelier if you change your order to something more expensive rather than letting you choose based on your original place in line, it means Tesla may be more interested in your money than your personal choice. In the old days, we'd call that bait and switch.