I flew on NK flight 347 from LGA-MYR and, as we pushed back at approx 6:14pm, I noticed Delta flight 1047 (6pm departure to ATL) N659DL (SkyTeam livery 757-200) was in line for takeoff in front of Terminal B for about 10 minutes. There were numerous taxi delays due to a wind shift causing them to change runways. That caused us (the NK flight) to be #25 for takeoff (!), while the DL flight was #22 for takeoff. As we were inching closer to the runway, N659DL turned onto the runway and taxied off of it, returning to the gate. No I see that it finally left again at 9:01pm.
So my question is, why would it return to the gate especially after waiting 1.05 hours and becoming #2 for departure?
Any info is greatly appreciated!
[Edited 2012-12-06 21:29:30]