SFO-JFK
Reserve delta Amex cardholder
General medallion member (at time of departure. After the flight I became silver)

girlfriend and I got D1 upgraded on a 767-300 at the gate.

~21 seats available day before and we kept getting pushed back toward the end as medallions joined the list. Finally we were like last available spot and one past. I asked gate agent to upgrade girlfriend first which he did and cleared her about 10 min prior to boarding.

i was in comfort and was just about to scan in when he cleared me for D1 too. Was really cool.