If you notice under users names on each post, there is a ranking. This is based 100% on post count, at least for now. We may explore other options in the future, such as a rep system.
Here is how the rankings break down by post count required:
0 - Freshman
1000 - Sophomore
2000 - Junior
3000 - Senior
5000 - All-ACC
10000 - All-American
100000 - Hall of Famer
We're open to suggestions on altering this, so if you have any, please post in this thread.