not sure how long the wait is should be no longer than 4 weeks. when you check in you will be given two different dates a class date and whats called "10 Days out" date. The class date is the actual beginning of your academics. Your 10 Days out is the 10 days before your "class date", the 10 days out concept is what the airforce uses to make sure everyone has their in-processing completed before they start training. 10 days out consists of about one brief a day of about an hour each and then you get to go home.
I really don't think the waits are that long