I want to be at that flight but years of flying DL made a trained monkey out of me, because the time of check-in and boarding make a difference over there (EDIT: when it comes to upgrades, oversold situations, etc.)

Thank you!
Check-in time used to be a tiebreaker for upgrades, as I recall, but I think they did away with that criterion. Someone who is even more anal than I am can confirm.
Heck, I can confirm...it still is:
http://www.continental.com/web/en-US.../upgrades.aspx