I’m very curious about this question too, as I go to UNC and didn’t realize there was some kind of bias on CC. It seems to me that most people place UNC on par with UVA, as they’re very similar.
As Greymeer’s link shows, UNC has a lower acceptance rate than Michigan and UVA, and a higher avg SAT score than UCLA… so clearly this supposed CC perception can’t stem from objective measures of selectivity.