In the absence of a better standardised test, I don't doubt it. However, I really don't think that the SAT does a good job of testing the kind of longer-form literacy that the OP is talking about. I showed the SAT English component to a British A-level English teacher a few weeks ago, and after reading a dozen questions he was red with rage, shouting about how idiotic it was to ask such asinine questions under such a heavy time pressure.
I guess I sorta can see what you're talking about, but from what I remember, the English section was easy BECAUSE it was so asinine. It was generally obvious how the question was guiding you to the solution.
