There is no way I could perform at that level today. I too, used to type at > 80 wpm error free. Today, on a reduced level of nicotine and an aging brain, I currently find letter transpositions in my typing. One word that pops up mistyped over and over is one that I type frequently: "nicotine". It keeps coming up about 1 time out of every 3 or 4 as "nicoitne". *argh*
That's why it drives me nuts to see employers announcing that to work for them, people must give up all use of nicotine. Last time I did that (over 20 years ago), my productivity fell to 10% of normal, and required several passes of review and editing. So to become (morally) worthy to be hired, those who are dependent on nicotine must become abstinent and, as a result, destroy the skills that make them valuable employees. Wonderful!