From the article:

Then we sat down two experts with more than 25 years of experience tasting beer and put their trained palates to work.
The experts saw no bottles, no cans, no labels. All they got was sample after sample of beer, straight from the fridge, poured carefully into wine glasses to allow for some foam formation.

The other more expensive imported beers (Heineken Premium Light, Amstel Light, Corona Light, and Beck s Premier Light) fell to the bottom of the Ratings because of defects, including oxidized and metallic flavors.

Heineken Premium Light was described as a  simple beer with boiled hops and at least some off-notes in every sample.

Beck s Premier Light. Though a beer with just 64 calories per bottle might seem tempting, our experts said there was  little beer flavor in this skunky light beer with cardboard and oxidized notes.