When the U.S. Supreme Court issued its 5-4 decision in Wal-Mart v. Dukes in June 2011, no one needed a Richter scale to know it was a Big One. In throwing out a mammoth lawsuit by women employees who claimed that they'd been systematically underpaid and underpromoted by the world's biggest corporation, the ruling upended decades of employment discrimination law and raised serious barriers to future large-scale discrimination cases of every kind…Two years later, it's becoming clear just how much the ruling has reshaped the American legal landscape. One measure of that change is the difference in the size of employee discrimination settlements…Another measure, lawyers representing women and minorities say, is the drop-off in new employment discrimination class-action lawsuits being filed. [Also refers to National City Bank, Merrill Lynch (part of Bank of America), Nucor, Costco.]