<p>I’ve been wondering the same thing for some time. . .from what i can tell you can drop from a straight A student to a B and C student and not get rescinded; i’ve even heard of a case in which one student failed a class and one didn’t get a single A during the second semester and they both still ended up at Penn. It happens, but not very often because if you’ve committed to Penn, and thus turned down offers elsewhere, and Penn rescinds you, then they are basically forcing you to take a year off and reapply at other schools the following year</p>