When someone suggested that he arrive later, the conversation did not go well. His point was simple: 6:30am-7am is a working time slot which produces big time later in the day. To make an adjustment would be to lose a key piece of his productivity. Sounds reasonable to me.
Each of us can carve out a sacred time each day (several times per day?) where we can get down to business and focus on a deep level. This might be first thing in the morning or from 3-3:30pm in the afternoon. Mini-routines can pay off big time if you allow them to find a home in your daily schedule.