that this might actually happen?
I have been let down time and time again. I've waited in all day, and the courier (usually Citysprint) claims to have attempted delivery at 7 pm, when I am in, but no card left, and certainly no ring at the door. Stuff that has arrived has turned up at 10 pm.
I have asked Amazon for a refund of the money I've paid, but all they have offered is another month of this shit service. The standard free delivery was better - at least if they couldn't deliver, I could pick it up from the Post Office the next day, not wait around for their delivery clowns to fail yet again to deliver.