If the information is accurate, I still can't fault the OP on this. If Delta tells someone that their flight isn't going to go until xx:xx then I think it is fair for anyone to assume that their flight won't leave until xx:xx or later. Delta is in the wrong here in my opinion (again, if the facts of this are true). Blaiming the poster for not knowing to work around a screwup that he/she didn't know was a screw up is completely missing the point. Especially as most fliers out there are not "experienced" flyers.