<p>For now, College Board sends a cumulative report of all your scores (students will be able choose which tests they send in March 2009) so you might as well mark it since they will see it anyways.</p>
<p>It shouldn't matter since the UCs look your best SAT score in a single sitting.</p>
<p>The news articles I've read state that College Board won't allow you to mix and match your best scores from different test dates for the Reasoning Test so I'm not sure how the UCs would have no choice but to look at your superscore.</p>