As I understand it, 3rd wave is in opposition to the old trend of blending coffees from different sources as well as mixing Arabica (considered the best) and Robust a (considered shit by lessers). So 3rd wave focuses on a single type of coffee from a single source, a heavy ficus on Aribica and much lighter, less bitter roasts. To me its all just sour.

I prefer blends as you can create unique flavor profiles. That woukd include blending Arabic a and robusta.