Ironically I only learnt touch typing because I had a part-time job as a tester for a company that made touch-typing program for the IBM PC.
In my experience, speed is just one of the many advantages. If you just watch the screen, never look at the keyboard and just type, you see mistakes and correct them on the go. Being able to talk to a co-worker while continuing to finish typing whatever I was working on. For me this is like flushing the write buffer of my mind.
I find that I update comments and documentation more consistently than my non-touch typing peers.
In my experience, speed is just one of the many advantages. If you just watch the screen, never look at the keyboard and just type, you see mistakes and correct them on the go. Being able to talk to a co-worker while continuing to finish typing whatever I was working on. For me this is like flushing the write buffer of my mind.
I find that I update comments and documentation more consistently than my non-touch typing peers.