^^ was this supposed to be a joke? (I laughed at first when I thought you meant stretching the left hand between the left CTRL key and the [ :-D ).
I guess I could see someone trying to type it one-handed with their right hand, but I would have never even have thought to do that (and I don't know that I ever use the right CTRL key anyway).
Outside of the CTRL keys, I touch type pretty much everything normally, with very few exceptions (like using my ring finger on Escape). I find moving my right pinky to the right CTRL key to be very uncomfortable, so I just always use the left CTRL key.