I have two Teslas. On both of them, I get close to the EPA range in city driving and lose 15%-20% on highway driving at 70-80 mph, on typical daytime temperatures for my area, which rarely drop below 40F in the winter or exceed 100F in the summer. On highways I always use autopilot, which keeps speed much more constant than I would -- it brakes and accelerates much less frequently. The estimates for battery use on trips are always accurate. I consider driving a high-risk chore, so I'm not an aggressive driver.

YMMV.