For programming, I would really suggest practicing with http://typing.io/
Yeah, I've seen that app, but I think the concept is kinda crazy, to be honest
I already code the whole day so I don't think I need that, and furthermore, while coding, autocomplete comes into play all the time. But generally, I'm rather looking to improve the speed of my conversational typing. Interesting observation about the guitar players though, thanks.
Personally, I believe touch typing has very little to do with whether or not your brain is fully developed and everything to do with comfort and confidence. I'm over 25 and just taught myself Dvorak. ... Most of all, it's about muscle memory.
Yes, you're right that it's about muscle memory. But my question was rather if you can significantly increase your typing speed when you're older, or will you never be able to reach 100+ or 120+ wpm as today's kids seem to be typing already at the age of 12?