I don't doubt that there are differences in taste. There are tons of different types of salmon. That said, I somehow question why you think farmed fish would be that much different in NZ or Norway. Both countries have a huge fishing industry.

I can only comment on the sources that you actually provide. The last time this guy was in the news was because he attacked mobile senders with an axe because of some idea about electromagnetic radiation was causing all kinds of health issues.