My father just called me and said he saw a story on the evening news...must be culled from what you were reporting.
We avoid farm-raised salmon because the environment where they are raised is polluted and overcrowded and so the farmers rely on heavy amounts of antibiotics in the feed to prevent disease and maximize yield (sound familiar? - just like the cattle and poultry industries here in the US). The bad part, and the part my father wanted to make me aware of, is that many of these farms are in the Pacific NW, where a lot of the wild salmon is from. With huge volumes of fish caught and sold, the TV report said that it was impossible to tell if the 'wild Pacific' salmon was exactly that, or just mislabeled farm salmon.
Here's one problem I actually hope the government gets off their ass to regulate, just like they did when they set the organic standards (a stopgap measure, but welcome nonetheless).