"Until there is data showing a correlation between SAT writing scores and college performance it will not be seen as important as CR and M scores by most colleges. " SAT Writing section score finally counts towards college admissions – Tutor Talk | Appelrouth Tutoring Services
"n the fall of 2008 analyses began to appear exploring the relationship between the SAT Writing score and academic performance in college. The largest single study was conducted by the College Board.
College Board psychometricians gathered data from over 150,000 students to determine which factors contributed and to what degree they contributed to collegiate performance (measured as Freshman GPA). The study revealed that a student’s high school GPA is the strongest single predictor of college performance. The correlation coefficient measuring the relationship between high school grades and college GPA was 0.36. The SAT by itself came in just behind high school GPA with a correlation coefficient of 0.35. When you combine high school GPA and SAT scores, you end up with a more robust prediction, yielding a correlation coefficient of 0.46.
The College Board researchers also explored the predictive power of individual SAT sections in isolation. If you had to chose only one SAT section to make a prediction of how a student would perform in college, which section would you choose: Math? Critical Reading? Or Writing?
It turns out that Writing takes the cake."