Maybe this might help...
It can't be first-come-first served because the email notifications go out in batches, depending on the service provider they use for marketing. Most organizations do not do this themselves, otherwise they would get blacklisted. They pay companies like Constant Contact or ExactTarget to do this for them. These companies throttle their outgoing SPAM as well, otherwise - blacklist.
Also, your own Internet provider will throttle these types of emails onto their own servers.
Sooooooooo, depending on where you are in the country or where your place is on that email list, you may never get notified at the same moment as the guy sitting next to you using a different provider. So, no - not whiners...