Some lakes with high populations of GSH do grow rather large sunfish. A prime example of this would be Deep Creek Lake in Maryland. The lake is full of GSH from fry to 10" pike candy. Yet, the lake produces hundreds of citation BG and PS every year including the state record BG at 3 lbs, 7 oz. The old 3 lb record was also caught out of Deep Creek Lake. I've personally caught over 2 dozen BG over a pound out of the lake.

There aren't any shad in the lake and I hope it stays that way. Another lake near my house is shad free is consistantly produces quality BG while many of the other similar lakes around it contain shad and have poor sunfish populations as far as quality sizes go.