I think what med was aiming for was what we consider a kind of inside meme culture assessment. At a first glance:

• House Howlester claims Highland Ceardian, but only the leader of the family actually expresses the culture, the rest are standard English Ceardian, even though they are Ithanian/Velheimer/Ceardian in mixture.
• House Yaotl doesn't do cultural expressions, largely because the Allar race lacks a cultural undertone besides Muh Lizards.
• House Harhold does Anglian Peasant Rp, but picks the peasant theme and not any of the pleasant Anglian cultural notions.
• House Sorenvik is appropriately Velheim.
• House Ravenstad is appropriately Leutz-Vixe.
• House Peirgarten claims Leutz-Vixe but on contradiction plays Ithanian.
• House Black plays standard English Ceardian.
• House Viduggla is appropriately Velheim.
• House de Letoirneay is appropriately Ithanian.
• House von Brühl is standard English Ceardian (even though Anglian or Alt-Regalian? I don't actually know).
• House Drache is appropriately Alt-Regalian.
• House von Rahm is appropriately Alt-Regalian, but something could be said about their Ithanian leaning principles of racial acceptance, and some of the strange female loving principles. It's hard to tell what culture they lean when you look away from the ruler.
• House Delmotte plays standard English Ceardian despite proclaiming Ithanian.
• House Carwell plays standard English Ceardian.
• House Sastra plays appropriately Daendroquin.
• House Saelanan plays very appropriately Altalar.
• House Sterke-enn plays appropriately Velheim
• House Longsae plays standard English Ceardian.
• House Rote plays standard English Ceardian.
• House du Pont plays standard English Ceardian despite proclaiming Leutz-Vixe.
• House Krupp plays standard English Ceardian (despite being Velheim? Or Alt-Regalian?)

What med is saying is that because more than half the nobility doesn't care to express a cultural identity or differentiation, that you're often talking to the same cookie cutter noble character. This usually falls down a number of standardized categories:

• The typical uwu frail but intelligent noble girl who is soft spoken and curtsies and is a hopeless romantic.
• The strong and masculine male smirking noble warrior with a six pack of abs and a long sword in hilt.

I think that personally, it's a lot of adult attitude of enforcing an unrealistic expectation on people who are between the ages of 14 and 18, and are often not even set on their own persona and tastes yet, let alone express cultural nuances and character identity in roleplay. Nobility to me should be accessible to everyone of every caliber of play quality (within the scope of non rulers of course).

I don't see the lack of cultural nuance that big of an issue. Does Peirgarten proclaiming Leutz-Vixe while playing 90% Ithanian irritate me in some way? Yeah, sometimes, because I wrote and co-wrote both cultures, and I feel usually culture just becomes a means to an end to slap on a backstory rather than a conscious choice, but there's a l0t of factors to this. Our "noble cultures" are extremely polarized, and I've found more often that people "accept" a culture, as opposed to actually choosing it because they enjoy it. I think that Peirgarten chose the Leutz-Vixe culture because they didn't want to be as extravagant as the Ithanian culture, but didn't want to pick a non-French culture, so they were forced to stick with Leutz-Vixe even though they express no part of it.

The only solution I can give to this entire situation is to expand more family cultures. I'm about 80% sure that the Peirgartens will switch to the Genevaud culture when it comes out, largely because many of the culture writings are also inspired by the expressions of the nobles, their playstyle. It means it's more likely that a culture is to be picked up when it is released, as opposed to ignored. The Breton culture is styled after du Pont, Genevaud after Peirgarten, North-German one after von Rahm etc. They give a community basis and the nobles some stricter capacity to express a culture they are comfortable with instead of forced on them.

Additionally I want to do more Jan Andermans events, where everyone chooses a different culture and spends a week reading the culture page up and down, and trying to express the cultural values in roleplay, which in itself is like a live lesson in cultural expression in roleplay. But that all depends on my active hours of course. Still, I don't see the problem as that drastically as a problem as med does. It's a flavor issue to me, not a fundamental shattering issue in nobility.