I was flying on Delta last week (PTY-BOS), with no elite status, on a discount ticket, but for some reason I had Sky Priority. I asked a few agents why this had occurred (not that I was going to complain), and they had no idea. One suggested that maybe I got it because I was seated in an exit row but she wasn't sure. I figured I would throw the question out to you fine folks. Maybe just a fluke? Any ideas?