com-pac 19 pointing ability

Have read posts in which com-pac 19 owners praise their boats but caution that windward performance is not too good. My question is: Comared to what? I realize the 19 is not a racing boat and it is unreasonable to expect it to go to windward as well as they do but at some point a boat that does not go to windward is a disappointment. How about the com-pac 19? To what, if any extent does a larger headsail help? Does the model with a centerboard(very limited production) make a difference? Thanks for feedback.