'match percentage' is a fuzzy subjective measure. To a large extent it's asking of OkCupid thinks two people having a conversation is a good idea, which is basically impossible to be a lie.
And they're doing it to fight against users being hideously misrepresentative, which is hilarious.
I often endure rage fits from one of my buddies who shows me example after example of cases where, for example, he answered "often" to a question a lady answered "usually," resulting in a mismatch.
The only good thing about it are key individual questions that let you judge someone's intelligence and determine if they're racist. The scalar number is a crock.
And they're doing it to fight against users being hideously misrepresentative, which is hilarious.