As a back of the envelope guess I would say about 50±10%. Solidly mediocre, but not tragically bad.
Jesus I hate our fans. Mediocre IS tragically bad. Get it through your skulls. 
Biggest problem with KSU (and its fanbase)? Being mediocre (at best) somehow translates to being on top of the world just because it means there are at least a few schools you're better than.
Mediocre is NOT tragically bad, no matter how much you wanna crap your pants over it.
I never said it was top of world either, in fact I specifically said it was MEDIOCRE (words do have meanings you know).
Mediocre IS bad when it comes to recognition. If you're not on top, you're on the bottom (to paraphrase Ricky Bobby's dad).
I challenge anyone without sports geek knowledge to tell me who finished the football season ranked 10-25. I can't. Because I could have cared less. I only cared about watching the top few teams play.
I'd also be surprised if you could find anyone who could list a majority of the last 32 teams in the NCAA field last year. Consider that there's like 331 D-1 basketball teams. You make the first cut of the tourney and you're in the top 10% in the nation. And unless you make the Final Four or possibly Elite Eight, who remembers you? What non-alum fans care?
Ask a non-Wildcat/non-Kansan about KSU football and they'll say that they were good for "a couple years". Pretty much true when you consider they never finished the season with a top 5 ranking and only went to the Fiesta (major) bowl twice.
Point being, if you're not in the elite, you're nobody.