Shelly, from posts here and from personal experience with a friend, I know that hospice care is wonderful. The nurses are very attuned to what is happening with the patient and can recognize the signs of impending death. Hospice also believes in keeping the patient as pain free as possible through appropriate medication, and easing the patient into their passage to "the other side."
It was unselfish of you to give your mom permission to let go. Many times, as I'm sure you know, patients will not let go if they feel a child or spouse doesn't want them to, which only causes additional suffering for terminal patients.