Steve Bell has been answering all of the pre-release vs final & boxed set / CD queries on the E-On forums.

There's a lot of duplicate questions and answers as everyone is clearly excited - and I think the tide of orders must be keeping their servers busy.

You'd be suprised the number of people who are staying up through different time zones to try and get their orders & download in, but as with traffic congestion will probably  ease after rush-hour/day! :)