Depends on your school. My school doesn't send authorization of graduation until you have completed your last rotation. So, for example, because I scheduled my last rotation (of 8) off, I got my ATT earlier than some of my classmates than took earlier rotations off.
Overall, Idaho is pretty fast at ATT though. Had mine the day after graduation and got licensed at the end of June. One classmate got licensed the first week in June, I thought that was impressive.