But it's not the fastest nor the quickest production car. Veyron is the fastest and 918 is the quickest AFAIK.
Per Tesla's press release:
The Model S P100D with Ludicrous mode is the third fastest accelerating production car ever produced, with a 0-60 mph time of 2.5* seconds. However, both the LaFerrari and the Porsche 918 Spyder were limited run, million dollar vehicles and cannot be bought new.
So it's currently the fastest production car.
And they're building a new Roadster too. Should be fast af.
Elon has recently stated that an upcoming Roadster is not currently a top priority. He said something to the effect that he would love to make a new Roadster but the other vehicles lined up are a bigger priority (Model 3, Model Y, pickup, urban mini bus thingy)