Yea I saw this in Tanzania too. Our clockwork machinery society doesn't work there (yet). I'm not so convinced they have to adapt. Maybe it is us who, in a post clockwork machinery society need to (re)learn from them ... One insight that struck me when I was there: this doesn't apply to time only, it is really related to numbers in general. While we obsess with how long, tall far or wide things are (in numbers) these things don't seem to matter much to the average Tanzanian, and they get uneasy having to answer such questions and will give widely inaccurate answers if pressed. Maybe there is a latent anti-colonial attitude at heart that inspires this? or something else. It's worthy of a study nonetheless, as more and more people suffer stress-related problems in the industrialized world