Breath taken. I'm sure their private comments to you were 'not intended for publication!' Yes, they would undoubtedly have been tired, but I doubt the reason the operation was postponed to later in the day was because they were 'too shaken'- rather it was the lack of a serviceable aeroplane at the early hours and also the complete inability to replace it AND cater/load/fuel it.
It is obviously necessary to warn all my colleagues to watch everything they say to ground staff now. You don't reveal what your connection is, MT driver, engineer, ground ops staff. I would think the crew wouldn't speak too complimentary to you following your 'snitching'.