^The EA rate for regular applicants is not much higher though. Think about it...
Harvard admitted 772 students early (or something fairly close to that number). The admit rate was about 17%. This may sound really high and definitely higher than 3%, but if you think about it twice you will get the ostensible quality of that data. During the EA cycle a lot of the accepted students are legacies, recruited athletes and URM's. Also, the non-hooked applicants in the EA pool tend to be a bit stronger than the ones in the RD pool, so if one is an "average" Harvard applicant, then the chance might not be that higher during EA as it seems. In fact, if you are surrounded by weaker applicants in the RD pool, your application will have a greater chance to stand out. So, I don't know...
PS: Talking about "average" and "weaker" Harvard applicants is kind of...strange?!