Originally Posted by SeriouslyLost

If they meant per capita then I'd agree with them: per capita, Americans don't travel much compared to their counterparts. What is it, less than 5% of Americans hold passports? Compare that to, say, Australia (65%) or Japan (~48%) or Germany (50% IIRC).

Yes, it's a generalization, but Americans simply aren't as well travelled compared to the populations of many countries. Read into that from there what you will.