I cannot find the proof anywhere in reputable documentation that it does, but I have heard in the past that Applications may take time to release in different countries. I'm not sure exactly what Apple's stance on it is now, but I'm pretty sure it's the same.

As for waiting for Stefan, we actually are not waiting for Stefan. When the application was submitted, Stefan had to send the specific time he wants it to be released. He could actually be asleep when it's released for all he cares.