It's probably hard to quantify "lazy and dumb," but H is right about the fact that millennials are taking longer than earlier generations to finish the same degrees.
Also, I should note that my protracted college study was in no small part due to the fact that I had zero interest in college immediately following high school, but no one believed me when I said I'd do it later. I wound up languishing in community college(s) for years, taking laughable course loads and semesters off because people insisted I go against my better judgment. As soon as I hit the point where I was ready to apply myself, I flew through my bachelor's degree and wound up one of the best in my class in grad school.
There's a lesson to be learned from my experience, I think, and that's the fact that a lot of kids could probably benefit from a little real-world experience before they take a shot at college. I know it would have saved me a lot of time and money, and I probably would have studied at a better undergraduate school because my transcript wouldn't have been such a mess.