Yes, the M1 is significantly faster than the i7-3770 listed in the Mathematica Benchmark report, but that processor was released in 2012.
Thus I wasn't considering that score, but rather what Murray Eisenberg obtained with the 8-core i9-9900K in his 2019 iMac. And based on that, the M1's comparative performance for MMA is somewhat slower than expected (even accounting for Rosetta 2), relative to its comparative performance thus far on other benchmarks.
Specifically, the score Murray obtained with the i9-9900K is 50% higher than what you obtained with an M1 Air. By contrast, some (though not all) benchmarks comparing the single-core performance of the M1 to that of the (even faster) i9-10900K have the M1 as faster when the benchmark is run natively, and approximately comparable when run under Rosetta 2. Thus it's natural to want to ensure that this discrepancy isn't because Murray's i9 was able to use all 8 cores.
More broadly, my own interest/curiosity is in assessing the performance of this new technology from Apple and, to do this, I think it's most meaningful to focus on per-core performance, since the current 4-performance-core limitation is merely a characteristic of these first models. Apple will be likely be offering higher-end systems with more cores in 2021.
It was interesting to see the benchmark you posted—thanks for doing that. But, to get a meaningful assessment of MMA's per-core performance on AS, we'll probably need to wait until WRI produces a build that runs natively on AS.