And you can downgrade it. You'll have to download the 6.1.x version you had, and convince itunes that the ipad is in recovery by putting it into DFU mode, then shift click restore (yes, you will have to restore, it wont update to that, but you can restore apps etc it from your last 6x version before you use it for too long).
The following links may be of some help
http://www.iclarified.com/tutorials/index.php
http://www.iclarified.com/750/where-...are-files-from
http://www.iclarified.com/8500/where...are-files-from