I was showing an elder some stuff on the web the other day, we were doing some research together. I don't think they ever used a Mac before, so everything was new, but we were just using the browser.
I had to show them how to scroll on the touch pad with the two finder swipe. They figured out the click fine even though there are no left and right click buttons.
In the midst of talking, the person touched the screen to click a link on a web site. I smiled, and clicked it for them using the touch pad.
Interesting what tablets and mobile devices are doing to people's expectations, however I dont think this person has used one of those either. Maybe just saw someone use it once and assumed my laptop worked the same.
See also: A Brief Rant on the Future of Interaction Design