Well it may not show how well they party, but the SAT has a large essay portion
I don't remember an essay portion on the SAT. Is this a new thing (as in the last 25 years)?
The SAT was redesigned in 2005 to eliminate the stupid analogies, add reading comprehension, free-form math, and added another section to test essay writing to test sentence/paragraph formation and general grammar (now scored on a 2400 point scale instead of a 1600 point scale).
They are re-redesigning the test again this year to make the essay optional (back down to 1600 points) and changing the grading of the essay to actually have some content of the essay factor into the score (in the 2005 version of the test, you could have scored perfect on the essay by writing total fictitious nonsense as long as it was grammatically and logically correct), eliminating the penalty for guessing (to match the ACT), and adding more achievement testing (also to match the ACT).