Do radial slicks hook better in the heat than bias?

My friend Terry has a 3100# 65 Mustang with him in it that runs 5.60's in the 1/8. He switched to radials last year when there were no bias plys available (14"x32").

He ran the car just a few passes and said, he would never go back to bias tires. Better stability and better times for him.

I can't see any negatives to running them, and when I need new tires I'll be switching to radials myself.

Tom