Is the CD version of iWork '09 updatable to the newly released version?

I finally reinstalled iWork from the iWork '09 disk.

At the following launch of the App Store I got a nice surprise.

And each application can be updated separately. No need to launch them prior to the App Store update.

All in all, I am pleasantly surprised by apple's choice to support the version of iWork which was still updated outside of the App Store in Mountain Lion.

Note:

After installing Mavericks, I updated the up to date version of iWork on my wive's computer and both versions are now installed. While on mine the fresh install of iWorks '09 was simply replaced with the latest iWork from the App Store.