I read that a while back and thought that while it was interesting, it was an awful small statistical sampling rom which to draw conclusions.
I also remember reading that by measuring the isotopes in his teeth and bones that they believed he was born and grew up not far away in Italy.
But the thing that got my mind to running around on rabbit tracks was thinking about what made Otzi so different that he travelled far and wide when most people probably never went more than a couple handfuls of miles from where they were born in their whole lives?