As a hypermiler I work very hard to avoid needing to brake at all. As such, brake cooling is so far down my list of concerns it's not worth considering. How many emergency braking events do you have in a normal drive? Even if you have one, you're not likely to power up to 100 and brake down again immediately after the fact.
Just to test one time, I arrived at work after my 10 mile commute. I reached around and was able to comfortably brush, then touch, then GRAB the brake rotor with my bare hand.
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11-mile commute: 100 mpg - - - Tank: 90.2 mpg / 1191 miles
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