I think that the quoted statistic is misleading. For the students that are at top-tier universities like Dartmouth, the vast majority of students are still grad

I think that the quoted statistic is misleading. For the students that are at top-tier universities like Dartmouth, the vast majority of students are still graduating in 4 years: http://colleges.usnews.rankingsandreviews.com/best-colleges/rankings/highest-grad-rate http://colleges.usnews.rankingsandreviews.com/best-colleges/... I think that the 6 year figure is due to an extraordinarily long tail.