AFTrainerguy,
If you’re talking about ANG/AFRC; it’s all about squadron mgt involvement in my experience. My unit worked hard for those who wanted to go to UPT and had the quals and motivation. I had a good relationship with the recruiters; made time early in the effort to meet candidates; then followed up to make sure tests, physicals were done and results relayed to the individuals. Westover, at several points had “unit babies” in every position below Wing/CC. The last 3 commanders were unit babies, too. That helps.
Went to a graduation at Laughlin just before I retired. I, as SQ/DO, had five UPT students from my unit there at once. Might be some kind of record.
GF