But that's a legitimate delay code. 93. If late inbound and you get aircraft away within MGT. DL93
Be it legitimate or not, as far as I'm concerned it's totally pointless as an announcement. The point is that it's delayed and that's all I need to know. Obviously it's delayed for one of a myriad of reasons which will have affected that aircraft that day (or even the previous day in some cases). To tell me it will be late departing because it's late arriving is quite frankly taking the pi$$! Just announce the delay and try and be as accurate as possible about the new departure time.