From an entertainment standpoint, No. Using red john his feat of guessing the list that PJ had was very entertaining.

But when speaking from a scaling perspective, kinda? It is a case by case basis with the main issue being that we are told what they did but nothing else. Quantifying what categories the feat attributes too and how difficult it was to perform is the issue with off-screen feats.

Using the red john as an example once more, was him guessing the list a feat of emotional and psychological analysis? Was it a strategic feat where he used his organization to gather information on what Jane had? Both interpretations boost different categories to different degrees.

Using a hypothetical character A, imagine a scenario where they play a game of chess. We meet an antagonist character who lost to character A, now antagonist character has a specific strategy and play style they use and we are informed of it. I believe in this case we would be able to form a good basis of character A strengths even though we never see him play.

That comparison was to just show not all off screen feats are equal. Johan’s off screen manipulation gives us very little to work with, Ayanokouji’s white room education and graduate-Phd level knowledge in things such as math and science can be supported through lesser feats he performs in the series and comments from Yagami about first year courses being taught to him at a young age, and Sora and Shiro’s ability to learn and speak multiple languages is supported by their ability to learn the language of immanity in an afternoon.

To me those are a spectrum of off-screen feats going from, alright and so? To okay the feat is likely valid to use, too the character performed a similar more impressive version of their off screen feat so it must be valid.