There's no question that having the professor grade on a curve is good for *you*, because you'll get a higher grade.
That having been said, I just wanted to put in a word for the professor, whose goal is to teach you a certain collection of concepts and techniques. Let's consider an extreme case: suppose you got the highest grade in the class, but it was only 40 points out of 150. Should you still get an A? I mean, obviously, it would be the professor's fault, if the best student learned such a small piece of the material, but still ... regardless of what grade you get, give the graded exam a good look and figure out what you missed and why. That'll let you really get something out of the exam.