Mid-size regional banks are facing the highest level of customer attrition, squeezed by better service at small banks and better distribution and scale at larger rivals, according to J.D. Power. Rocky Clancy, vice president of financial services at J.D. Power, discusses how certain regional banks, including Cullen/Frost (CFR) and Huntington (HBAN), are outperforming and setting an example for other banks' customer satisfaction levels.