Ben Askren, a pretty good wrestler and coach, doesn't seem to be a fan of holding kids back. I know he definitely feels NOT being held back helped him in the long run. His belief is that graduating on time gave him quicker access to tougher training partners, D1 competition, D1 training and facilities, and D1 coaching (although he had a great high school coach.) He felt that getting all that stuff a year earlier (actually on time) put him ahead of many of his contemporaries.