Probably not. I think this discovery was made partly because of a larger study by a Japanese university where they analyzed all the existing nasca lines and tried to find new ones.

I've also visited Peru, not sure how that's relevant though (nor is it relevant that I'm married to a Peruvian)

They are probably referring to how a lot of tour guides in Peru will explain that the locals knew about the locations long before white people showed up. Usually, "discovered" means white people or at least non-aborigenese populations discovered it.

It means becoming known to the scientific community and nothing more.

To put it another way: Scientific knowledge is like wikipedia, and things only count as discovered in this sense once they get an article written for them. That doesn't mean the person who wrote the article was the first person to ever know about something.