found this at wekipedia
In one study of average computer users, the average rate for transcription was 33 words per minute, and only 19 words per minute for composition. In the same study, when the group was divided into "fast", "moderate" and "slow" groups, the average speeds were 40wpm, 35wpm, and 23wpm respectively. Two-finger typists, sometimes also referred to as "Search-and-Peck" typists can reach speeds of about 37wpm for memorized text, and 27wpm when copying text.
An average typist reaches 50 to 70wpm, while some positions can require 80 to 95 (usually the minimum required for dispatch positions and other typing jobs), and some advanced typists work at speeds above 120. As of 2005[update], Barbara Blackburn is the fastest typist in the world, according to The Guinness Book of World Records. Using the Dvorak Simplified Keyboard, she has maintained 150 wpm for 50 minutes, 170 wpm for shorter periods of time, and has been clocked at a peak speed of 212 wpm. Blackburn failed her typing class in high school, first encountered the Dvorak keyboard in 1938, quickly learned to achieve very high speeds and occasionally toured giving speed-typing demonstrations during her secretarial career.
I can't even type at a 200 word per minute pace when i'm just typing random letters about 3 to 7 letters long