The first A320 Family Aircraft in the MSN 10,000 range has been Delivered today. No, Airbus didn't jump any MSN numbers. MSN 10002, destined for Iberia, was widely anticipated to be a Test for both Airbus & its suppliers systems to make sure it can handle Aircraft in the MSN 10,000 range. The quick delivery process could indicate that most (if not all) tests went well.
Another Aircraft (MSN 10001) is expected in Hamburg (XFW) soon. Again, likely to test systems in that Final Assembly line.
In 2017 Airbus created a video describing these new changes: