I expected to do worse...

Advanced

You scored 93% Beginner, 93% Intermediate, 87% Advanced, and 72% Expert!
You have an extremely good understanding of beginner, intermediate, and advanced level commonly confused English words, getting at least 75% of each of these three levels' questions correct. This is an exceptional score. Remember, these are commonly confused English words, which means most people don't use them properly. You got an extremely respectable score.
http://www.okcupid.com/tests/take?testid=14457200288064322170