Well, I think that fella needs to read about DIED's pond since he thinks sunfish can't get more than half to a full pound.
Very true. My personal opinion is that if most folks could raise GSF that reach a pound then the GSF would be a much more sought after fish. I can tell you from personal experience that a large GSF hits like a freight train and pulls like a Mack Truck. However that is my personal opinion and it's remotely possible that I'm very slightly baised.