The point I was trying to make is, when tesla accepted deposits, it did NOT labeled deposit by configurations, but rather by the model, which happens to be ‘X’. So it is true while all X’s are not D, but they are not 90D or P90D either. That is why all deposit holders were given a ‘Reservation Sequence Number’. The exact language cited in the email confirmation was; “Your Reservation Sequence Number indicates your place in our reservation queue and the order in which you'll be invited to finalize your Model X configuration, options, and packages”.
When order que was opened up in late Fall-2015, tesla website already had ‘70D’, 90D and P90D configurations to choose from. So when deposit holders were called upon to configure their orders based on above sequence numbers, they were not discriminated at that point, but certainly placed them behind those who had configured a higher-priced options. In fact, my friend had configured (first time) his 90D order while providing $5K deposit soon after I confirmed my order in Dec-2015, he received his 90D in late January and I am still waiting to receive my 75D with $107K options before TTL. What do you call that???