Just took delivery of our Model X yesterday, built the week of March 13th. Only very minimal ghosting. Less than my Model S. My wife and I both are tall and even with the seats set low still look through the upper part if the windshield.
On a different note, the tint on the upper half of the window seems much darker and extends lower down the windshield than the two X's we test drove in December. It actually intrudes down into where I look through when driving, everything looks darker, and the panoramic effect overall is less pronounced. Could just be misremembering though. Need to compare side by side with an older X to say there's any difference for sure.