Do you weight against school and course load? It's easy to get a 3.9 GPA and it's easy to take a few upper division math classes taught by a top field professor and get much less than that. The 3.0 I got in my upper level discrete math was more meaningful than the 4.0 that I got in most of my upper level CS courses (and with a phd, it's all moot now a anyways).

I see so many 4.0 students from top schools that it doesn't even turn my eye anymore (grade inflation is a bad problem in china).