yes, certain schools recruit exclusively american players such as stanford but thats because of their tradition, they typically get the cream of the crop of american juniors. therefore, they can be very competitive against other schools where they have mostly foreign players. therefore, a school that doesn't have the tennis tradition of a stanford would have to recruit foreign players to stay competitive. i think you saw what may happen when your american recruits don't stack up to the best foreign recruits, stanford had a mediocre season last year. their women's team seems like they just keep rolling though with their dynasty. i believe the best american juniors, especially the men, are turning pro rather than going to college. thus, stanford and schools like them are being hurt but the exodus of talent to the pro tour.