I'm a new owner (in that I never owned a Model S before--December 2014 delivery) who is probably not quite as bothered by these things as wk057, but is also not quite as satisfied as fellow new owner MarcG. I expect the two reasons I'm not bothered quite as much as wk057 is are, the already mentioned fact that I was not a previous Model S owner, and also the fact that I never owned a performance car like the P85D before, so really had no idea what to expect. I'm one of the people that was attracted by the tech more than by the car, as I've never been a car person. And were it not for what I've been reading here, I'd have no idea that I should be upset about the missing HP, the efficiency, etc.
On the other hand, I have a great deal of experience in customer service, I can recognize excellent and less than excellent customer service when I'm getting it, and I strongly believe one should get what they pay for. Would I know that I hadn't received what I paid for without TMC? Absolutely not. But the fact of the matter is that I do, and it most definitely does bother me.
There are people who, if walking out of a store, realizing they've been short-changed a dollar, would just keep walking, figuring it's only a dollar, and not worth taking the time to go back for. That's not me. I'd turn around and go back. And it's only a little bit about the money. It's a lot about the principle. I can't stand feeling I've been ripped off--even a little bit, and even if it was an honest mistake. I want things made right.
That's where I'm coming from on a lot of this stuff.
+1, Head on nail for me...;-)