Q: Do you primarily use Ruby for Ruby on Rails development?
A: <snide>No, I primarily use it for milking cows. http://hobnobblog.com/faculty-favorites/you-have-two-cows-the-government/</snide> But in reality Yes I do. I do most of my small scripting jobs in eLisp.
Q: For how many years have you used Ruby?
A: Years, an Apollonian construct. Friedrich Nietzsche 1872 wrote a book 'The Birth of Tragedy.' in which he said cultures swing between two perspectives. The Apollonian, crisp, premeditated, intellectualized and perfect; plumb, level, square and centered. Verses the other end, the Dionysian perspective. Given to the passions and intuition tollerant of organic texture and human gesture. I prefer to think not in terms of the length of time I have worked with ruby on rails than to my ability with it. Which I would describe as organic. For the Apollonian see the number given in http://workingwithrails.com/person/14809-charles-m-magid under Experience heading.