Any building with modern (last 100 years) insulation is going to have relatively equal distribution of heat between the floors. Except the bottom floor, where people enter/exit and mix in outside air.
It was the first seven floors. Coincidentally, also the floors most of the higher-ups don't work on. Or at least that's how it's being reported, so I don't think people's outrage is absurd.
Ground level and basement floors have been known as the coolest places in skyscrapers for centuries.