Promises notwithstanding, model 3 and Y are some of the most efficient EV's on the market, getting more mile/kwh (or less kwh/100km, or however you measure it) than their competitors.

Don't have a tesla myself, (kia e-niro), but weather will have an enormous impact on range, did a ~400km loop last week, 200km up north, used only 14.7kwh/100km, and the 200km back used more than 21.7kwh/100km. (Tailwind vs headwind)