As a recent (delivery mid June) Model S buyer with the 60 (software limited 75) battery (dual motor), I am a little bummed missed out on a 1.1 second 0-60 drop by a few weeks.
But I can't say I am surprised - I expected there would be some improvements (including speed) right before (and probably right after as well) Model 3 debut.
So if I expected changes why didn't I wait until after Model 3 debut to order Model S? Two reasons: 1) I got the last of the Model S 60Ds and had to have air suspension. As you know, that option was dropped from the 75 after the 60s were put to pasture. That means that to get the air suspension now, I would have to get the 100D. With the other options I had (SAS, UW seats, PUP, paint, etc) a 100D would have commanded too much of a premium. 2) its a tech product. Yes it's $100k instead of $500-$900 for a phone or a few $K for a computer...but it's still tech! It will get better - and cheaper. As people have said here, compare a 2017 75/75D to a P85 from a just a couple of years ago. One costs $75-80k and the other commanded $110k or more. And they perform similarly and have similar range. And the current car has standard features like all glass roof and power lift gate.
So if I had held out I would have had to spend another $15k to upgrade to a 100D (or slightly less for the 90D before it too went away)....and in 3 months or 6 months or 9 months had passed...there will be more/better/faster stuff added. If you wait, especially with Tesla, you will always be waiting.
It's not a secret. We know they change when ever...usually around the start of a new quarter. And Elon said if you can't accept that, then Tesla may not be the car for you because they are not going to stop.
I am still hopeful that perhaps we will get some speed bump through software alone. I think if it's possible - we will get it. If we don't get it, then it's probably not possible. Maybe it's only a few tenths w/o the new hardware. I'd still take it. But if I don't get any speed bump...I'll still love my new Tesla and won't sweat it.
I was the beneficiary of a small change (not so cool as a 1 sec 0-60 drop)...the console sliding cover is carbon fiber to match my carbon fiber decor. I understand that prior to sometime in May, these were matte black even if you had carbon fiber trim. So I got the new matching cover and I like it better. It's a small thing I know but there are probably some people who got cars in March or even April who wished they had the matching cover. Big or small, Tesla will keep improving things. Sometime you "win" and sometimes you "lose". But you will always get the best car that Tesla is making at that point in time.