I'm not sure why we needed a new thread to continue an existing discussion, but such is life, I suppose...

For the USA the card will arrive in 5-7 days unless you sign up via the telephone and specifically request overnight delivery, and that may or may not be available; it was for me when i initially signed up a few years ago.

As for being disappointed, you will be if the benefits are not useful to you or if you think that they are something they are not. There are a ton of threads here that detail what they are, so I won't get in to that, but if you know what you are supposed to be getting going in to it then you should have no reason to be disappointed. If you expect the 2-4-1 IAP to save you tons of money on your next leisure trip to Europe or for the Concierge to come up with last minute seats at face value to the NCAA Final 4 championships then you are likely to be disappointed.