In an interview with Inc.com, Sullivan stated his biggest mistake in his career was the way he handled the rollout of Carrabba's Italian Grill. “"With Outback we would approach a new market by developing one new restaurant in the first year and two or three more in the second year. With Carrabba's, we developed four, five, and six restaurants in the first year. We should have gone in and made sure our franchisee partners had opened their first restaurant in a successful manner before we started with a second one.”, he told the interviewer, going on to reveal that not getting the people side right at the restaurant caused major problems that took two years to correct and “a lot of money”"".