This wouldn't surprise me at all, honestly. I've rarely gone to fancy restaraunts, but when I have, I generally explain to the wait staff what kind of thing I prefer, and then ask them for their advice and just trust it 100%. The way I see it, if they are competent enough to work at a high-end restaraunt, they know what to bring out to get a nice tip.
Side-note: I'm currently watching through the HBO Show "Succession". If you've seen it, (without revealing any personal details) any insight on whether or not the ultra-rich are in anyway similar to how they are portrayed on shows like that? I tend to think that there are probably a mix of good and bad out there, just like any other economic "class" of people, I've just never interacted with people who own literal mega-yachts before, so it's all assumption on my part. I'll also understand if you choose not to say. I'm just trying to get a general feel of what people in that economic group are like in-person. Are they difficult to deal with? Backstab-y? Petty and childish? Genuinely nice and pleasant to be around? Or just kind of chill, but very business minded and self-motivated?