What McDonald's did have, however, was a way to estimate what temperature it's customers in general prefer their coffee served at. Roadside Coffee is, after all, a pretty competitive market. If you're too far off temperature wise, people go elsewhere.
Hence, by the standards of "the community", or whatever you wish to call them, McDonald's served coffee at the right temperature. Or at least close enough not to offend enough of them to lose measurable business.
Out of curiosity, did McDonald's manage to poor milk into the cup, and still have it end up that hot? Maybe I have weird ideas about coffee, but for someone all too used to lukewarm coffee once milk is added, that actually sounds quite impressive for such a decidedly low rent establishment.