Got my first one today SLC-SAN. Was 5 of 8 most of the day for 4 seats, and after preboarding began, my name dropped off the list and I got the upgrade when they scanned my BP. That makes me 1 for 6 on DL this year. Feels a little bit like winning the lottery.
BTW - I was served a PDB, too, on a 737-800. Snack basket service.
I was 13 of 13 for one seat on my earlier PDX-SLC flight, so no-go on that one. But this was all on an $85 WN price matching fare, so I can't complain.