I know the guys at bloomington gold have trademarked the word "survivor" for their show, but I think the word is still over used to describe any some what original car. While my car has never been in a show, I have been to their show and they have everything from Camaro to Ferrari to Bug, to even Toyota supra. If it has been preserved and is least over 20 to 30 years old based on class, they will accept your money (about $300 last time I checked) and judge your car based on their criteria. I went to the show to get an understanding (like you) of what is considered a survivor , and just to get a frame of reference for my own car which I knew wasn't in their ZZenith class, but fell into the next category I think they referred to as fingerprint - "FingerPrint™ Standards may range from good to outstanding preservation. However, total refinishing, replacement, damage and deterioration must not exceed 25% from factory new. "
I liked the show, most of the cars were older and some of them you could just look at and know they had barley been touched since new, just driven and well kept. The Judges are pretty knowledgeable about finishes and patina, but may not know every correct nut and bolt that should be on a specific car, Vs. the camaro nationals where I assume they have enough original examples to be for certain.
If you wanted to document your car as being original and have a certificate that says so, or if you wanted to sell or get an appraisal I am sure this is a piece of documentation that may aid you.
I would recommend attending at least once, every year there is a new batch trying to get certified so it is virtually a new show every year.