I went to WashU (#1 on that list) and while the dorms were nice I wouldn't say they were "nicer than your apartment" or "luxury". The benefits that you would find that you wouldn't find at most other places are personal bathrooms (sort of... you're still sharing with other students but just not a full hall of them), tempurpedic mattresses (only in the older dorms when I was there), and maybe carpeted floors. Beyond that it's not like we got anything crazy. We had a common room that was basically a table and a few chairs to study at, one in the basement that had a few couches and a TV, and one tiny kitchen for the entire building.

Just a little bit of context as far as "luxury dorms" go since I see WashU at the top of almost every list. Maybe luxury means your plumbing doesn't break when it gets cold and you don't get athlete's foot from the showers in the shared bathroom.