As the deputy minister indicated, there was one common thread: most of these people had demonstrated a truly substantial attachment to Canada. They may have lived here all of their lives, or virtually all, or they live here currently. A wide range of circumstances got them into the situation--in some cases, administrative error. Perhaps coming back from the U.S., the baby's documents were stamped “Canadian citizen” when in fact they weren't.
So there was a broad range, but in every case there was a substantial commitment to Canada.