I was doing some testing a few weeks back at CMP in an ITA CRX.
We had some victoracers that were about 4 years old, (after a couple of years who is even still counting), had been full tread but had been run a couple of times, but there really was not much wear on them at all. They came with the car when we bought it. We decided to throw them on for a session and see what happened.....
Well......... we actually ran about .5 secs faster on the victoracers than hoosier R6s that had 4 heat cycles on them.
Now the hoosiers were much easier to drive fast and felt much better, but if you were really able to "get up on the wheel" the victoracers were definitely faster.
I am pretty sure we will be running that "special set of tires" this weekend too.
We experienced the same thing few year back with another car as well.
I have never bought any personally, but, I would never tell anyone not to as everytime we have used them, the performed much better then expected and actually as fast or faster than "the tire to have" everytime we tested back to back.
If the car you are using them on is light, I would give it a try.
Derek Ketchie