How did you validate this research? It is not like companies that do profiling do that in the open, in verifiable manner.

Also, weird you mention dvorak. I know this is just a hyperbole for the joke of being an easy to identify linux hacker... but keymap is the one thing you can't use for fingerprinting... well, you are able to use the language (by detecting typed in keycodes and matching against a mimum denominator of keymaps) but not the keymap itself (e.g. no way to see qwerty-US vs dvorak-US, but easy to detect -US vs -DE for example)