As a member of the non-competitive class, I hope I can say without bias that even Yellow is too high if you can't duel your way out of a wet paper bag. I don't care how well you know the rules. Though it's pretty hard to rule the rules if you can't do the duels.
Heh, poetry.
But yeah. I'm not really feeling it. There's more to reaching a certain rank than dueling well, but this is an academy for duelists. And I don't want us to develop a reputation for unskilled upperclassmen, personally. I want somebody to be able to look at even our Yellow-ranked students and know that they've got their act together, they just haven't awakened their full potential yet and aren't the competitive best at the school. Not that they can fill out a questionnaire about how the game works. That's, like, top-of-the-class Red stuff at most. In my opinion, anyway.