I switched to Dvorak on regular staggered keyboards and got to 80-90 WPM or so, but pretty much lost my ability to QWERTY.
Then I switched back to QWERTY full time for 5+ years.
Then I switched to Norman on an ErgoDox, getting to 80-90 WPM or so again. This time around, I could still QWERTY on a staggered keyboard just fine. Night and day vs. the first attempt.
(Then I switched back to QWERTY again. Now I can't Dvorak or Norman or ErgoDox!)
I switched to Dvorak on regular staggered keyboards and got to 80-90 WPM or so, but pretty much lost my ability to QWERTY.
Then I switched back to QWERTY full time for 5+ years.
Then I switched to Norman on an ErgoDox, getting to 80-90 WPM or so again. This time around, I could still QWERTY on a staggered keyboard just fine. Night and day vs. the first attempt.
(Then I switched back to QWERTY again. Now I can't Dvorak or Norman or ErgoDox!)