I´ve been on at least 20 cambered boards in my two decades of snowboarding. My Nitro Team Gullwing carves as well as almost any of them (except my boardercross-Palmers). The one thing a great cambered board preforms better in is catching an edge in a icy landing after some serious air!
My personal opinion is that rocker/flat boards is more forgiving on edgepressure and therefore can be pressed harder. With cambered boards, especially on groomers, i sometime press my board into a nosedives (the front edge cuts to deep) causing major bails..!! The rocker/flat boards i´ve tried handles this kind of carving smoother and don´t causes the same type of "nosedives".
Excuse my spelling, I´m Swedish!
Nitro Team Gullwing
Burton Mission Doom