Again, this car is $90,000, which is a market that the major automakers aren't traditionally interested in (aside from very small-run flagship vehicles). I would expect the Tesla to be very polished at that price point.
You hear similar things for their other cars (still high-end though, yes) - basically everything they've demoed has had reviews saying "wow" to the electric, and "even more wow" to the execution of everything else. Why is Tesla doing so well, with the same people, unless the existing industry has been lazy?