Upgrades will not commence until end of Aug or beginning of September...
My experience is the same as ANC-RED EYE when trying to ask for an upgrade at the gate... Since the first target date [March 31st], I have missed 8 out of 16 upgrades and most of them resulted in the flight leaving with some F seats open... Every time I miss an upgrade, I get bitterer and more frustrated.
I am begging AS to keep the deadline targeted for end of August... DL's IT needs to get their act together...