It's a bit pseudo ooc/ic depending on what you're looking at. There are player-relevant bits that are obviously OOC. Family history and current status of nobles has long been accepted as IC.
Advies have long been considered as OOC knowledge on family-page-basis alone despite being listed with the nobles; I had noticed some treating it as more IC recently though. It's not something that is enforced by rules as much as by player pressure/culture, in my experience.
The page could probably use some visual separation of noble and adventurer characters.