OK my rant Tim and Terry!
Most of the nurseries are trying to sell the right plant, especially the ones endorsed by this site and tested by a number of our members. They are human however. They often have inherited this name from another vendor and have kept that label on that plant religiously, thinking it is correct. I don't think orders from any of these reputable sources is going to give you mostly wrong plants, rather they are the exception, not the rule. In fact, I have only received one dubious plant since I started growing them again in 2010.
Winnie Crane was the only person I know that took on the NOIDs directly. She had all the semp nurseries in the US send plants to her under the name they had received them and then bought all the verified specimens from Peter Mitchell, founder of the Semp Society. That was when we only had 300 cultivars! It would be impossible to do it now.
Lynn has worked hard to verify the identity of the plants as have our friends in Germany. As I sit in my office I have 50 years of records of my own on these plants and some of the original descriptions from the catalogs in which the cultivar was introduced.
OK ranting over. We've never had it so good!
Kevin