KJRGT,
I've talked to quite a few detailers about that same subject. I've also spent hours researching it on the internet as well, browsing just about every detailing forum on the web and every thread about carnauba. All in all, I've probably got 8 to 9 hours of my life gone forever just researching the advantage of high end waxes. Good thing I like detailing!
After speaking to many other detailers in the U.S., Canada, and United Kingdom all separately via PM & E-mail they have all said quite a few things that pair up. First and foremost that higher end waxes, those about $200.00 USD and up produce great results with proper surface prep. Higher up in the ranks, to the tune of $1,100 or more you get not only into waxes that have a higher carnuaba by volume but carnauba waxes that are formulated with other exotic ingredients to not only produce a rich shine but also give the durability natural carnauba lacks with its low melting point. All of the waxes on the market are mixed in with different waxes (beeswax, etc..) for different results. Some produce a dramatically deep gloss, others a durable coating, some are just mediocre or re-labeled products, while it is the higher end waxes that have been formulated to give the best of both worlds - The deepest shine and the durability natural carnauba lacks. Actual carnauba is inexpensive and not durable at all. It's melting point is around 180*F which is the equivalent of your car's panel outside exposed to the sun for a few hours. But the depth it adds, in the experienced eyes of those analyzing, is dramatic enough to continue formulating different versions intended for different things. I doubt I would be able to tell the difference between Meg's NXT and Zymol Vintage split on the same body panel...but drive the car for a couple of months and it will be obvious.
No I don't mean to talk like a salesman, but thats the truth. I got unbiased opinions by people that use $1,000+++ waxes everyday. I got to know them too, and they're not any different than you or me - If your Ford GT fell apart left and right, you'd probably voice your thoughts. Some louder than others. The same applies here, they don't have stock invested in these wax companies, they don't care if someone else's product sucks, they'll tell you the truth. So after all my research, that is what I concluded. I had an open mind during my research and could have leaned either way. I ignored the manufacturer, ignored the naysayers, and just went straight to the people that actually own and use the products themselves. Why ask how a Ford GT performs to a guy that doesn't own one?
If anyone is wondering about the comparison of carnauba vs. synthetic sealant (Zaino), PM me and I'll direct you to some more reading.
We all know what opinions are like and that everyone has one. :thumbsup