[bradleyjg]

The bar exam has little to nothing to do with what's taught in law school. Virtually everyone takes a six week, several thousand dollar cram course to prepare for the bar. Passing is a factor of how seriously you take this cram course and raw intelligence. Both of these factors are predictable before even starting law school -- the first corresponds roughly to undergraduate GPA (adjusted if necessary for major), the second to LSAT score. The only other major confounding factor is that those who have English as a second language tend to fare poorly, even when taking the normal predictors into account.

More prestigious schools don't have better outcomes because they are better at teaching, they have better outputs because they start with better inputs. The market for lawyers knows this quite well, and if anything overweights it. So there is no need to double up on the signal via differential grades.