You know, this really is the big myth being sold by the press these days. I just shopped for a new high end car and, just for grins, I researched the Tesla extensively, read all the reviews, rode in my neighbor's S, etc. And I came away convinced that this car is massively overrated performance wise, unless you focus on the fuel savings. It's not any faster than comparably priced vehicles, doesn't have a better ride quality, and, most importantly, it doesn't handle better (a Panamera will leave a Tesla in the dust the minute the road gets twisty). It's not all that roomy either. Finally, while it is a generally handsome car in an Aston Martin copy kinda way, it really is pretty bland looking the more time you spend looking at it.
I get the Model S as a ground breaking electric car, and probably the first ever good looking electric car ever made, but I do think the performance aspect has been oversold. There's a lot more to performance than a 0-60 time, which, while very quick, is still no better than the competition in that price range.
Look at it this way, if the Tesla offered the exact same performance in the exact same package, but it had an ICE in it, would it be selling well against the competition?