In terms of writing speed Regal, I'm a bit like you. I can easily go over 40 words per minute but if I do then I start making more and more mistakes and as I speed up here and I'm giong worse an d worse and often by brain can't keep wup with what I want to write and so fingers go in the wrong order and I make more and more mistakes adn this gets worse and worse and I have gotten really quite good at typing fast and I know where and when I'm making mistakes because I can feel my typing out of order or hitting the wrong key but I can't use the backspace beause that's banned by the wthing which sucks. Anyway, that was me going at high speeds. (It also doesn't help that my keyboard can be slighty faulty at times and doesn't always register key-presses.
(Also, apparently my fingers really like hitting the 'w' key, which may be an offset from gaming.)