I think what he means is look at some earlier posts to get an idea. There are a lot of posts that are locked because this becomes a heated debate. Some also make this agrument based on MDapps. I believe you can search for students accepted or interviewing at specific schools (or all schools) based on race. According to MDapps, there is not a very big overall difference in acceptances based on African American URM status when compared to caucasian status:
Caucasian accepted (including incomplete applications and not selecting a school or year): "2700 results in set, 30.9 average MCAT, 3.60 average GPA. Search took 5.51 seconds."
African American accepted (including incomplete applications and not selecting a school or year): "
108 results in set, 30.4 average MCAT, 3.59 average GPA. Search took 0.97 seconds."
It is also worth noting that the numbers in each pool of applicants (108 to 2700) is quite different. Additionally, mdapps it seems that sometimes mdapps stats are somewhat inflated as they are often well above the averages that schools report on their websites and to US News.
That said, according to AAMC, here are the statistics (means) for 2005:
Caucasian matriculants : 10.1V 10.2P 10.6B; 3.61 BCMP; 3.66 total GPA; 10,295 matriculants total
African American matriculants : 8.2V 8.2P 8.8B; 3.23 BCMP; 3.36 total GPA; 1,068 matriculants total
http://www.aamc.org/data/facts/2005/mcatgparaceeth.htm
This is where the dispute comes from, however, applicants are certainly more than just numbers. It sounds like you have a lot to talk about in terms of activities, so good luck to you.