And here is mention of a post-war study I had not heard of before.
"Many years after the war, a study by the U.S. Air Force, code named Sabre Measure Charlie, downgraded the F-86 Sabre-versus-MiG-15 “kill ratio” from more than 14 to 1 to a revised figure of 7 to 1. The latter figure remains the best achievement in any fighter campaign in history prior to Operation Desert Storm."
Source:
http://www.koreanwar60.com/air-force
Ed