what FA's really know about their delayed aircraft?

My dh was on CO28 last evening (tail #13), he had known since sat evening that the flight was going to be delayed about 3 hours due to the late arrival of the aircraft from Tel Aviv. This was just a domino effect...late departure, late arrival and so on.

This was a fact well before the Sunday morning incident at EWR....yet the FA was telling passengers that the delay was due to the UA incident!

My dh listened with amused interest and certainly felt no need to correct her.