I've had the cheese plate at almost all the signature restaurants (I think Citrico's is the only one I haven't tried), and Cali Grill, by far, is the best. This is the only place where all the cheeses AND accompaniments were identified and described for us. The wait staff was very knowledgeable about what they were serving. They even suggested a great dessert wine to enhance the flavor of one of the cheeses we liked.
Flying Fish DID identify the cheeses, which is a great step up from Yachtsman and Artist Point, which couldn't even tell you the family of some cheeses (i.e. cheddar! or the like). I'll taste the cheese regardless of whether I know what it is, but it enhances the experience if you know what it is and some history on the kind of cheese or the process to make it or whatever. At most of the signatures, they just hand you a plate of cheese and accompaniments. At CG, it's more of an experience....
Just my 2 cents.