Kappa Sigma has thrived since withdrawing from the NIC.
From the KS website:
"The Kappa Sigma Fraternity has officially set a new record for total men pledged in a single semester with the pledging of 4248 men in the Fall of 2007, marking the largest pledge class in the Fraternity’s history and the fifth-consecutive Fall semester where Kappa Sigma has broken its own record for men pledged."
Here's a link to the whole article:
Kappa Sigma Sets New Recruitment Record!