Not sure that I agree 100% that salaries for recent law grads are bimodal despite having read that for the past decade or so from several credible sources. There are exceptions.
Law salaries vary by region & location within that region & by type of employer.
Also, for those who want biglaw, it is not as elusive as rumored if one works in a specialty area for a few years & enters biglaw as a mid-level or senior associate.