[milch]

I went from only using my MacBook's builtin keyboard to using a Lily58 split keyboard and it took probably about 2 weeks to fully adjust. I started out at around 100-110 wpm on the standard keyboard. On the first day of the split I was doing about 20-30 wpm, after a week I was up to 60 wpm, and then 80wpm after 2 weeks. Kept improving more slowly after that. I did switch cold turkey, i.e. using it 100% of the time including at work.

Now I'm about a year and a half later and am up to 140wpm. I think the biggest problem for me on the standard keyboard is the bottom row index fingers and pinkies, the "natural" motion of my fingers lands right in between the two keys on those fingers so I used to make a lot of mistakes there, especially when typing fast.