It is always funny to see Americans using huge (as in HUGE) glasses to drink wine, believing that it is the French distinguished way of tasting wine, and being disappointed when they discover that French people just use regular/smallish glasses in any context. No, it is just Americans confusing 'big' for 'refined' as usual :-) (and bigger for more refined, and even bigger for super classy).
As with everything, it's a trend. If you served dinner with a smaller wine glass (an XL5, for example), some people would wonder if you'd missed a memo. Gets a bit silly. Larger glasses allow for more surface area, sure, but they're impractically delicate to use and clean. But then, if you think that's silly, consider jeans. For almost everyone in a Western country, if you left the house in jeans with a really unfash…
There’s a good signal that those circles are to be avoided.