> but you can press them faster if you want

I mean, yes but not really? There's very real speed limits to the human finger, after all.

But the times given above are also quite far off - the actual keyboard numbers seem to be more in the 5-15ms range, not 30+ms. At least, my mechanical gaming keyboard is hitting 8ms on this test: http://blog.seethis.link/scan-rate-estimator/