The brakes seemed fine.
I probably did about 15-25 laps, not as many as most cars out there that were running all day. I had to shoot video and so I wasn't planning on racing anyway.
When they told me to get out there , I just jumped in my car, put on my helmet and went out there with street tire pressures and original brakes on my 40K mile car. My tires were fairly new with only 3K on them, so they hooked up fine.

The brakes felt fine and I never felt any fade or pulsation at all. I started off easy my first lap or two, but after that it was balls out. I was coming down Gurnery Bend doing about 115mph and was hard into the brakes up till the hairpin.

track map here: http://www.sebringraceway.com/track.html

That's when I would have expected to see some signs of brake trouble. But the little SVTF did fine. The Mustangs being heavier were on the brake alot sooner, by the time they exited the hairpin I was heading down the Fangio Chicane, of course they caught up to me in no time flat, but by then it was time for another turn.