I currently use a qwerty layout and I wanted to try the dvorak one. My main concern is about still being able to retain the qwerty speed. I know this has to do with muscle memory, but I'd like to know from former qwerty users whether they still retain good speed on the qwerty layout after switching over to dvorak. Also, has anyone tried to switch back to qwerty from dvorak ? How much time does it take to regain the old speed. Currently I average around 75 wpm on the qwerty format.