Several of my friends from graduate school agree that their time in the ivory tower resulted in a poor return-on-investment when compared to the limited gains they received later.
This always bugs me though. People who have degrees who think the degrees are worthless (for other people). They do not realize all the benefits they gain by having that "piece of paper." Whereas people like myself, who went to college relatively late in life, HAVE LIVED without the experience OR the piece of paper. It sucks.