Of course, I agree with you. It's just by referencing the 20 year old age, I was thinking about the circa age when the wide majority of people start their careers (20-25). But like I said in my original comment, there are those exceptions of cool people that started hacking late in life and your dad is certainly one!
I still think the assumption that hacking started with programming is wrong, there've been countless hackers, they were just generally confined to physical media (eg: engineers). And I don't think making the transition towards software wasn't all that radical for most.
