<p>PC ~ I don't know the answer to your original query; sorry. But it seems doubtful to me that a rule of thumb could be too useful on SAT II scores, except by major, since there is such a large variance in the score distributions by subject. For example, at a university with an engineering school the engineering kids are likely to be required to take the Math 2C and at least one other science SAT II. Of course, given the selectivity of the school and the level of international participation in the program, the average scores could vary a lot compared to the verbal portion of the SAT I. And even if one could figure out such a rule of thumb for the engineering kids, I would guess that a different rule would apply for the art history majors at the same university...and it is even harder to consider the utility of any rule if the university in question is offerring an "average" 25-75% range for the SAT I scores for a combined pool of art history and engineering applicants...</p>
<p>All that being said, I have noticed among top students on CC who are headed for engineering/science that they seem more likely to have an 800 on the SAT I than on the SAT II tests. I attribute this unscientific impression of mine to superior preparation for the SAT I. I would go further and guess that there is often a gap of 30-50 points between the average of the Math/Verbal on SAT I and the average of the top three SAT II scores, but again that is just my impression, and CC is a scary place to form impressions...</p>