Nobody knows how many go up on any given Monday. Same is true for how long it would take before it went up, since they can only get through X amt per session, if there is a bulk it could be a couple of weeks.
LOA's are determined on Monday, written and mailed out on Weds., that is why people start threads on Thurs, Fri and Sat, saying they got one. Also why I have said don't stalk the mailman, because chances are if it isn't in the mailbox on Sat, it will not show up until at least next Thursday.
PEOPLE need to understand for the AFA very very few LOA's come down, about 150-200, don't wrap yourself around the thought of getting an LOA. You have a 1 in 20 chance out of qualified applicants. 5 yrs from now when you walk into your 1st squadron, do you think anybody there is going to treat you special because you got an LOA to an SA? NO, and that is how you need to remember it when you wait by the mailbox.