The length of time that it takes to restore an image can vary depending on the image size. If it seem like it is taking longer than expected, please open a support ticket so that the team can check it's progress.

It restored after 25 minutes, in less than a minute since I posted this question.

You may want to post a message when restrore starts to that effect. Since the backup took 6 minutes I was expecting the restore in the same ballpark and not 4 times longer.

How can it take that long to restore an image? Are we not past the era restoring server backups from tapes? I'm currently restoring a backup that look about 30 minutes to create. Judging by this thread it might be ready next week. :/