It is indeed a hugely stellar big deal. The average time per rank is three years before you're even allowed to test for advancement unless you get the highest marks on evaluations and points for accomplishments, like he said. Tell him this E6 (Yeoman) is very proud to hear his news. This accomplishment speaks very highly of his character, work ethic, and leadership abilities. He has certainly set the bar for those he leads
Hoo-Rah!!!!!