Those might be the worst American cars in terms of cost to own for 3 to 5 years, but there are some good, solid vehicles on that list. Reliability, or rather lack thereof, was obviously not their primary target for the list.
The full size sedans are a very limited market but those models dominate that market. Used car prices on those sedans is low because the owners like the reliablity of a newer car, and are accustomed to purchasing a new vehicle every 4 years or so. The resale market is then flooded with those cars that don't appeal to a wide audience, so used car prices are very low. One of the reasons I love the Grand Marquis, you can get a LOT of pre-owned, RWD, V-8 car for relatively low dollars. Prices are rediculously low - especially here in Florida, but they're good cars.