It does help a little to have some typing speed, but haste makes waste.
When it comes to typing speed, I disagree. Yes, much of my programming is sitting and thinking, but once I decide how to tackle a certain difficult task, and sort it out in my head, I wish I could type faster. (I touch-type approx. 70 wpm and am missing my right index finger.) Sometimes I write pseudo code to be filled in later so that I can get my inspiration poured out of my brain.
I think experience, rather than typing speed will create better code. I (typically) no longer make common mistakes like = when I meant
[We] use bad software and bad machines for the wrong things. -- R.W. Hamming