John is a portfolio manager at a mid-sized investment firm. Over the last year, he has managed a diversified portfolio with a capital allocation of $10 million. The portfolio's return was 12%, while the benchmark return was 10%. During a performance evaluation meeting, John's supervisor pointed out that although the portfolio outperformed its benchmark, it is essential to consider risk-adjusted returns and compare them to relevant benchmarks. The firm primarily uses the Sharpe ratio for performance appraisal.
Which of the following statements regarding John’s portfolio performance is correct?