Up until about 3 months ago I was consistently able to claim the 2500 miles as it took longer than 20 minutes for bags every time, even with the priority tag. Lately the bags have been coming out quicker (all bags, not just priority). Still, it’s a great way to get an extra 2500 miles usually. I make note of what time the fight status updates to “flight complete” and then start the 20 minutes.