From the data side: the M4 hasn't made it to the charts yet but the M3 already holds the 4th place in PassMark's single thread chart as well https://www.cpubenchmark.net/singleThread.html as well as tops Cinebench 2024 https://www.cpu-monkey.com/en/cpu_benchmark-cinebench_2024_s...
The only areas the M series "lags" is in the high end workstation/server segment where they don't really have a 96+ core option or in spaces where you pop in beefy high end GPUs. Everything else the M4 tends to lead in right now.