I wonder what it is with a normal keyboard? I think I can type faster than I can talk. I never learned the keyboard, but my fingers know where all the keys are. I can't tell you the order of letters of the qwerty keyboard, but my brain knows where all the keys are.
You can't type faster than you can talk. Trained stenotypists come close, but there's nobody who can consistently hit 130-150 wpm on a QWERTY or DVORAK keyboard.
You can - if 150 wpm is what you speak, with Plover and training you can reach 120-225 wpm on a qwerty keyboard with NKRO capability. But it's indeed steno (on a regular keyboard). With regular strokes and autocomplete you might reach 70 wpm or more
https://www.youtube.com/watch?v=Wpv-Qb-dB6g
