I would say so because we all know what reaction/shot shape we want out of a ball when we drill it. As such, when you throw it and see nothing close to what you were looking for, you have a pretty good idea that you've missed the mark. Now, that being said, it makes sense to try some surface changes and possibly even plugging and redrilling (sometimes) to try to correct it. But, yes, it usually doesn't take long to tell whether or not a particular ball is going to be what I was looking for.