There are six dyno pulls and the variance in peak horsepower from the lowest to highest output is less than 7 wheel horsepower. That is in 100 degree weather, phenomenal. This shows a tune delivering consistent output. Additionally, an engine dealing very well with the heat. It will of course suffer from heat soak but you will not see this level of consistent power delivery from the new AMG M157 twin turbo V8 among six pulls in 100 degree weather.
This is why Mercedes-Benz chose the M156/M159 V8 as the basis for the SLS Black Series which is built to be their highest performing car around the racetrack. Consistent performance from lap to lap without having to worry about going into limp mode or the ECU pulling timing considerably.