I don't have clear cut idea but as per my knowledge it is not difficult to get job in US for Nepalese Nurses. But they have to give TOEFL exams (IBT now) and score 80 or above and they have to give 1/2 more nursing exams to get the eqivalence here. So if someone is average smart its not hard at all. And again it takes some time  to complete all those exams. Nurses get H1 very easily.