I saw a "new" IS-F today and it had 16 miles on the odo. They told me a tech needs to inspect/test drive the car. I suppose it depends on how many miles the tech drives the car. My "new" IS350 that I actually bought a couple of years ago (when it was really hot) had 120 miles on it.
My ISF had around 29 when I picked mine up. I was told it came with 16 and the tech had to do some test... If I recall correctly, when I picked up my 330xi a couple years back it had no more than 10 miles on the odo. I am sure someone at the Lexus dealership took the F out somewhere. It's too early to tell how much of the life was reduced if it was abused within those first 20+ miles.
My IS-F had 3miles on the odometer when I picked it up (it had just arrived from the port the previous evening)....however the salesperson begged me to test drive it with him before I left the dealership, so it had about 5 miles when I left.
Mine had 28 miles on it. Supposedly I was the first person to test drive it. Hope that was true. I really want the engine to break in properly. It's soooo tempting to step on it but I've resisted so far