Here's a report from this morning... I was scheduled on the 6:25am CLE-IAH flight. When I checked ITN at midnight it was A4 F0, when I checked at 3:00am they moved it to A4 F4, at this point I decided to wait it out and see if the EUA was going to run as advertised. NOPE... No EUA and when I arrived at the airport at 5:15am F was full.

So in my expierience the EUA did not run at 3 hrs. I should have called and got the upgrade manually, but I wanted to play this out and see what would happen. Result No upgrade and a comfy seat in Coach.