If the dates in our accounts keep changing, why would any of us believe what the website estimates for new deliveries?
With the exception of those that sold their vehicles (or leases ended, etc.) in anticipation of a March delivery, most everyone else here just wants their new toy (now!) It is human nature to want immediate gratification after the decision has been made to spend the money. However, at the end of the day, this is just a car to get you from point A to B. Same thing with the latest iPhone people want immediately -- at the end of the day, it's just a phone. We all need to relax.
I am anxious too, but August will be here before you know...