True for me. Using spacemacs which uses vi style keybindings, so most shortcuts are key sequences instead of chords. I think its faster for me to press two or three characters on the keyboard my fingers are already on before I move them into place on another keyboard.

Adding a second keyboard and using the Russian layout is a cool method to use a 2nd keyboard that doesn't just duplicate the keys of the first, and likely has more fun applications than just adding more shortcuts to your text editor.

That's definitely true for vi; but only after you properly remap your ESC key to something else (usually jj or caps lock).

Emacs is a differenet story... By default it uses a lot of alt and ctrl key combinations and also makes heavy usage of the arrow and home/end keys. Of course, there is a vi mode for emacs (evil; this is what Spacemacs uses) to take advantage of vi keys in emacs. But I believe that most emacs users just stick to the alt/ctrl shortcuts.