Nouveau riche are notorious for buying things that they can't really use the way they were built to be used, and often wouldn't know how to use them when given the opportunity.
That's the disdain being mentioned. It's not being snobby. It's recognizing people with fake status symbols.
If your story to be told is about stacking girls, then Mustang it is. That's being honest.
Of course a status symbol works to a large extent, otherwise people wouldn't be spending money on them.
I'm nowhere near the social circles of "old money", but I'd imagine they're more amused with seeing people trying too hard to push themselves into upper society, than being insecure about their own status. I mean, I don't have to be upper class to find this behavior somewhat comical.
