I've never ran on a track before, but ride on the street/in the mountains quite hard on my 636r. I've been on power pure's the last two seasons, and don't think I will ever go back to anything else.
They have consistently had no chicken strips to speak of since the second week on my first set. The amount of grip, and confidence they provide is amazing.
Lack of chicken strips isn't a sign of a good tire. You can easily get any tire out there, even Shinkos, to the edge of the tire. How much feel and how hard you can push once you get there is what makes the difference.
A fast pace in the mountains wouldn't even get you out of beginner at the track half the time.