For a number of law schools, yes that is true. However, given that there are many good law schools this cannot be confirmed. This rumor is often cited by many professors at lesser known law schools as the reason their programs require much more work e.g. larger reading assignments, a more stringent sacratic method wherein more students are questioned about the assignments in class etc. There are very good law schools that inflate grades of students because they do not want students leaving with a poor GPA making it difficult to obtain a job after graduation. The best way to find out if your destination school has a difficult program is to ask the current students, most will be willing to talk with you and be very candid. To get a frame of reference you should also speak with students at lesser known law schools in your area or where you may want to attend.