So I got off the phone with a Tesla advisor to ask about my Model S 75D to see what production date it was produced to see if I got the speed upgrade and what he told me was that update 17.26.76 (which was applied end of June) had given our car the updated speed. Unfortunately, my car has been at the service center since the 3rd day of me getting it because it has some delivery issues (scratch, paint defect, and etc) so I cant test it. When I asked him about the new DU he said that "no, its just a software update". He said it he DU was changed, it would be a major change. So I am confused too now. Anyone else experience this or get the update to feel any faster? P.S. he said mine was produced on the 16th of June.