I'm not sure how correct it is, because the worlds fastest typer types at 150 wpm for 50 min (37,500 key strokes).
True, it's correct. I don't know how fast that world's fastest typer, but if he can type only 150 then he's not the fastest typer. Period.
Also, it's true that people can type even faster if they don't have to look at the screen to see if they made a mistake or to see what word is next. But then again, I'd be even faster, and although English IS a foreign language to me, I still type fast.