I am quite a bit above 90 wpm. Almost exactly double for sustained (1 min+), and more than that for burst.
My theory is that the Intel macs generate too much heat for the chassis to handle (I'm currently on a 16" 2019), especially when being used by IntelliJ in projects with many files, having additional dev stuff running in the background, and with an external monitor connected.
Additionally, I perceive more lag on the Mac itself than on the external monitor, so I think there is a component that is due to the slow speed of the Macbook Pro display.