OKC even early on had lots of new users that didn't necessarily fit well in the site culture (/formed different subcultures). Those people had more visually-oriented profiles, focused less on funny writing, would largely not use the quizzes, and if they did they'd answer quizzes very differently from you, and you'd still get your great >90% match dates filtering them out, and it didn't really matter! The filter worked!

(I found my literal 99% match before OKCupid went too wrong, so I don't really know how it fell. I'm assuming overt monetization poisoned the well.)