<p>No, all UCs consider scores from a whole sitting and do not mix and match from seperate sittings, like USC (and most private for that matter).</p>
<p>The simplest step that could be taken by the UC would be to use single-sitting scores for admissions purposes and then report their scores mix/matched. That way, any reason why they have decided to retain the policy would not affect admissions, and then the published numbers would go up.</p>
<p>Of course, this would open up the floor for criticism, although the private schools are not really ones to talk...</p>