In my experience yes, most people do touch type, and no, most people don't use right control much, if at all. The right control key on many keyboards is already so uncomfortable to reach that even single-hand chording with the left hand feels better. Using caps lock as the control key makes it even easier to completely avoid the right control key.

However, I have also seen mention of people remapping return to the right control key, then doing who knows that to still be able to press return.