I didn't score a 26 AA, but I know someone who did. He is now an Orthodontist that graduated with a Harvard DDS. He told me that he basically secluded himself from civilization for three months to study the DAT like his life depended on it. He even sacrificed quality time from his then girlfriend (now wife) during this time period. He only seen and talked to her a few times during the 3 months he was studying for test.
I spent 6 weeks full-time studying for the test, but I wasn't willing to sacrifice quality time with my wife. I thought six weeks was unbearable. I guess that's why I didn't score 26.