"If you're a good enough fly fisher to buy a $800-$1000 rod you should be able to cast both just as well, right?"
Boy, did you say a mouthful there 7star.
Many new FF'ers believe that because they spend that much on a rod, they will be able to cast it well. Many good casters, that like you say, can cast both well, no longer spend for performance, but either spend less or spend more for personal gratification through the aquisition of very fine equipment. It's what they like, not what they need.
Does anyone know if they produce a grass rod that one would feel secure with doing dorado and other SW targets?
....lee s.