I was on a ATL-SLC flight the other day and walked to the gate to take a look at the upgrade list. There were 123 people on the upgrade wait list...and myself as a Diamond Member with Delta was 23 on that list!!!!!! How can that be??? Are other airlines upgrade waiting the same?? What is causing the HUGE list? Is it the rollover miles that are creating more members? I found it stupid....and frustrating.