To be fair, as someone who is similar in not using touch typing (but hits high wpm), new keyboards do throw me a little bit, and it takes me 10-30 minutes on one to get my error rate back down to negligible. That said, I instinctively know when I have typed an error, even on a new keyboard, and so am already moving to hit backspace before my brain even goes "oops, wait, you made a mistake", so the new keyboard is really just slowing me down rather than leading to bad output.