Sorry, but I don't believe you. I touch type very fast. I practically live in Vim and the command line. Still I talk waaaay faster. Unless your typing consists of "LOL, GR8 M8!" or you're really slow talker, I don't buy that you're typing faster then you're talking.

Not to mention all the precision, articulation, nuance, gesticulation, interactive feedback, non-verbal clues etc. that IMs are simply missing.