i took mine into a passport office end of Aug and received it in 8-9 business days. If you mail it or go to receiving agent it could take upto 4 months, Definetely recommend to go to passport office. If you can, do the applications on line, as when you go to the passport office, you must tell them you did the on line application, then they will allow you into a separate line up which is must quicker then people bringing paper applications.
I am sure with fall around the corner, the offices will start getting backed up again. So the sooner you go, the better!