You'd better get to Mt. Pleasant early and cram yourself up near the starting line if you're going to make your goal. The first three miles can be a real slog if you're stuck in the wrong group. I've had brief shouting matches with people who were walking up the center of the course less than a mile into the race.
they corral people now, which helps a bit. i mean, it's still a complete cluster at the start. but except for the people who just straight up lie about their expected times, for the most part you're going to have faster people in front of you (plus getting to mt. pleasant isn't going to help all that much since you can't get in a different corral just by getting there earlier).