<p>IMO, 30% is pretty influential and prominent, at least to me. :)</p>
<p>But, more importantly, I believe that the 30% number you reference includes Frosh in the denominator, but Frosh are ineligible to pledge. Thus, the % of Greek members is closer to 50% of those eligible to join, i.e., ~half of the Sophs-Seniors.</p>