Piping or not, if the chicken was that hot, you wouldn't be able to grab a leg and gnaw on it as depicted in the commercial as it would sear human tissue.
Kentucky Fried Chicken has a minimum hold time of 20 minutes (after being cooked) before it can be served.
This is for two reasons: the 20 minute rest allows the temperature to equalize (carry-over cooking), and if it were served directly out of the fryer, it would still be piping hot, and it would sear human tissue.
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