This isn't really about the Roloffs, although the author mentions the Roloffs. She attended the same LPA conference back in the 80's in Michigan where Matt and Amy met.
She explains how back then there a was apparently a pecking order among LP's. People with achondroplasia (the type of dwarfism that Amy and Zach have) were at the top. She feels things have changed in recent years.
It's a pretty interesting article: