Its well known that second third of the quarter (meaning Feb, May, Aug, Nov) are cars for East Coast. (first third being for EU, and last third being for West Coast). So its not surprising that he is getting his (being not on the West Coast), even though you have the same build (because you are on the West Coast). Yours will be built next month (June).
I am also West Coast, so I am hoping for June; however I got black/black (hate the black plastic bottom on all other colors, at least on black it blends in), and black color has not been produced at all (only prototypes/test cars). So I may be waiting until September. Which I am frankly ok with seeing how they are making changes constantly and improving upon the process. These being brand new products they ought to have some imperfections (as pointed out by people that got theirs already, the back seats, hooks, heat pump noise, etc...).. With Model 3 being so mature they may make a change a few times a quarter, with Y they got to be improving on daily basis. So every day delayed makes your car better.