Yes. But it's always a good idea to keep an older version around awhile, "just in case". It might save you in a crunch. There are still a few bugs floating around in 2013 that might bite you. That older version could come in handy.
When you've had some time with 2013 and feel completely comfortable with it you can always recover the space then.
Dave Hein, P.E.
OP as a heads-up, you'll probably encounter the snap scaling bug -- in other words you go to scale from an endpoint or intersection and it tells you the scale is too small, and cancels the command. One workaround is to not have the cursor directly over the endpoint or intersection when you go to click the mouse button. It apparently doesn't like reading the potential scale as zero....
OP as a heads-up, you'll probably encounter the snap scaling bug
That is not a new "bug", and it's entirely avoidable by not putting the basepoint for the SCALE back within the APERTURE when AutoCAD is prompting for a scale factor/destination.