Modern marketing machines aside, I think the human condition really lends itself to exploring the world like this. There must be some base instinct which tends to support a high level of empathy and respect for the courageous and peaceful strangers who throw themselves into a foreign culture like this. Obviously some tribes don't invite strangers so easily, but often the people you think would be most hostile are the ones that welcome you the warmest.
One thing I'm mildly curious about, when asked, did they say they were Canadian? ;-)
Kudos to Clara and Jeff, and thanks for sharing your story with us.
EDIT: For those harping on them carrying an iPhone/iPad, let me just say this; feel free to comment about how your own similar experience was further enhanced by also unplugging. In the meantime, I'm impressed with anyone who can take such a large bet on the chivalry of strangers in a foreign land and come out so much better for it. Personally I think carrying an iPhone is orthogonal, because it's a useful planning and safety tool which does little to dampen the experience a trip like this can bring.