Whats funny and ironic is that this actually makes finding pirated content much easier since only actual sites that contain pirated content are the ones that will be listed on DMCA complaint list
I assume that, if they legally could, they wouldn't show you anything
More than once I've done a search for something pedestrian (no intent for piracy/etc) only to notice the "some results removed" link. Out of curiosity I've clicked it, just to see what crazy things have been removed, and been quite amused/interested in the results.