It all depends on the training pipeline, age of the applicant, PPL/no PPL (for Pilot/RPA selects), etc. A lot of factors go into it. Most of my intel is from previous years threads and some people I personally know.
There are some people who had nearly a year wait from selection to departing for their assignment at UPT. People who have a PPL have a higher likelihood of being put in an earlier class and in turn PCS before others. URT is all TDY from your current duty station for current AD members. UCT now does their own form of IFS at NAS Pensacola.