The US sailors haven't been good travellers in general I have found. Always been under represented at the F18 worlds. Look at Australia for example in comparison. 6 teams and over half of those paid their own way, and the Aussie dollar is weaker than the US too.

Also the same with the A-Cats. In 2007 the US hosted a well-attended worlds with approx 60 boats from the US and 40 from other nations (rough numbers and 6 or 7 boats from Australia). Next worlds in Jan09 in Australia and similar number of total entries, but no US boats!