Cornell is known to have great wait-list movement! Myself and a large portion of the class was accepted off the waitlist.
66% of Cornell's originally accepted students go elsewhere, leaving a large portion of the class accepted off the waitlist. This is due partly to Cornell's unique acceptance strategy - accepting a portion "early" in December, a second "early" portion on the first day of acceptance letters, then accepting more throughout the cycle as they begin hearing from December applicants. Because most of the December and early March accepted students are the ones vying for a spot at Harvard or UPenn, many wait until late April to tell Cornell that they were accepted off the waitlist at these top schools before withdrawing their app, leaving the waitlist to be a typically slow and late-moving one.
I hope this helps, and good luck to everyone who, like me, was Cornell-hopeful until very late in the cycle!