There's already a bunch of other posts disputing this claim (and I want to be clear that I agree with the disputations :) ), but the 2 cents I want to throw in are:
Having built an ErgoDox (from the online plans) I regularly use it and have good muscle memory for it. When I switch to a regular keyboard my muscle memory for that other keyboard kicks in and I'm able to use that one fine.
It's actually harder to switch from using my ErgoDox on Windows to the same ErgoDox on Mac because I use the bottom-left key for control on Windows and the bottom-right key for Command on Mac (both on the left-hand-side of the keyboard).
Even that's not too bad, but there is a noticeable 'switch over' time - maybe 5-10 minutes or so.
Having built an ErgoDox (from the online plans) I regularly use it and have good muscle memory for it. When I switch to a regular keyboard my muscle memory for that other keyboard kicks in and I'm able to use that one fine.
It's actually harder to switch from using my ErgoDox on Windows to the same ErgoDox on Mac because I use the bottom-left key for control on Windows and the bottom-right key for Command on Mac (both on the left-hand-side of the keyboard).
Even that's not too bad, but there is a noticeable 'switch over' time - maybe 5-10 minutes or so.