I caught an upgrade on DTW-AUS on the CRJ this year, but it was an off day. I'd actually bought food in the terminal because I didn't expect to get the upgrade.
I've got additional DL flights coming up, but I'm trying to limit those to shorter routes as I'll qualify on segments for MVPG (and perhaps, if I'm lucky, 75K) this year. Depending on how the year looks, I might credit some additional AA flights I have over to AS if it puts me over the hump.