It's a demonstration of the heat throttling. Still impressive.
Im wondering if it will continue to throttle though, and how much the m3 will throttle.
If you look at the geekbench scores the m3 scores between 4100-5000, m5 between 4900 and 5900 and the m7 between 5400 and 6700. This is removing runs that are low outliers which can be run with a lot of backround tasks running.
Still quite a increase from the m7, wondering what happens if you push it further though.