^^^well worded. Your fourth paragraph (I think abnormal means unwanted, undesirable, struggling, whatever) is exactly why I had a bit of a problem with Brokengymnast labeling several as "normal" sororities - implying the couple of others were not and again, I hope she was simply referring to a difference in numbers, but the conotation, as you said, is pretty negative. They are all solid, diverse, normal sororities (or at least as normal as anyone can be at U of O -lol), and you stated that well.
I feel like U of O is lucky to currently have what I consider a pretty healthy system. I don't think its perfect (daughter does have areas where she feels it falls short in comparison to other systems she knows), but all the chapters are doing well at least from the numbers standpoint, they are adding chapters, and I think there is a good balance on campus between Greek and non-Greek. Its an active system, but it doesn't dominate the campus social scene and as a parent I like that. But that's another tangent, so I'll stop now.