Sorry IVF, but when someone gives their word they will do something by a given day, they should be accountable for it. That's one of the things wrong with our country - people don't stand by their word.
I have to agree with this. If the promise can't be kept by the stated date, an e-mail explaining the delay should be sent. It only takes a minute or two, doesn't cost a thing, and serves the purpose to keep customers happy. It would also stop things like the first post on this thread!