I find that I make more mistakes when typing than when writing on paper. The stop editing advice I agree with, but I also think there's a benefit to slowing down and allowing the idea time to make its way to the page, so in that way the speed of typing can be a detriment. At this point, my brain/finger interaction doesn’t raise to the level of a conscious thought. This means that when typing I often substitute similar sounding words, transpose words, use a word with many of the same letters, or just leave words completely out. I have never had this problem when writing on paper. When rereading later, these can be difficult to catch, since your brain is excellent at filling in the blanks.