The articles I've read (your's included) explicitly pointed out Costco's Organic olive oil. Costco also sells a non-Organic version that's cheaper but I haven't seen anyone say either way if it's actually EVOO.
FWIW, having bought a bottle of the non-organic EVOO at Costco today, I can say it is labeled as if it is real.
In Spain 20 euros buys you a liter of the best specialty extra virgin olive oil. This is why good olive oil poured over a toast covered with pureed tomatoes is such a popular breakfast.
Trader Joe's has it for $6.99-9.99, though after reading this article, I'd like to hear some confirmation on its quality.