This is like reverse "firewalling", the act of putting up a strict barrier between in character and out of character knowledge. I think this is a bad idea on a number of levels. Setting aside the idea of tailoring information to a specific result, like for an awareness of knowledge roll (you roll poorly, you only get something vague - but if you roll well you get additional detail), the player should be the one deciding how they will parse the descriptions into what their character understands, and have their character react accordingly (and, incidentally, this is one of the reasons I believe it's impossible to completely separate IC and OOC knowledge, to the point where I don't even actively try).
|Do really want the GM to talk to you like this?|
So...tailoring the information given to a specific metric? Pretty much standard practice, I think. Tailoring how the information is given to the receiver based purely on in-game characteristics? Not really seeing how this is a good thing - unless someone can convince me otherwise.