The reverse of this can be true too. Growing up, we weren't rich, but did better than most my friends families. Downplaying that your largish (4 kids) family flies across the country for a week plus vacation once a year and not talking about money or new stuff stuff becomes a thing then too. Partly that was probably me being overly sensitive, but group dynamics and expectations are tricky things, and this was only a mild difference.

Edit: I should note this was in northern California, where people generally do not vacation on the east coast because of both local attractions and a high cost of living that makes saving for vacations much harder to do. We happened to have some family in the Carolinas which was part of our reason.