I was told that supermarket coffee is very low grade in Argentina and that because it is poor quality it is toasted with sugar to reduce the bitter taste of poor quality coffee. There are some expensive brands of coffee sold in super markets that state they are not toasted with sugar but I haven't found much difference except in the inflated price. I bought a Nespresso machine so that solves the problem. Nespresso is excellent coffee. The problem is that coffee in cafes is usually horrible - generally strong and bitter. Like so many things in Argentina, the national standard is poor and becomes the standard by which people judge the rest of the world. This seems to be why, for example, someone once wrote about a relative who considers Argentine medialunas better than croissants served in Paris. I guess you like what you're used to.