I am wondering if it makes the process any quicker if you do a walk in FP. My FP appointment was set for 5/28 but gotten my FP done on 5/8 as I was off from work. The stamp on the back of my FP letter is dated 5/28, so makes me think that they wont be sending anything to FBI until after 5/28.
it will make the process faster. They will not schedule you for an interview until the FB results are in.