On Wednesday, Apple issued its first update to the new GarageBand 10 for Mavericks. The release of version 10.0.1, which "improves stability and addresses a number of minor issues," is nothing spectacular in itself. What is interesting, however, is that the update--downloaded through the Mac App Store--was only 28.9MB on my Mac Pro. The full GarageBand 10 download? 749MB.
In the past (including with Tuesday's iTunes 11.1.3 update) Mac App Store updates to iLife and iWork apps were huge downloads, basically a complete installation. This relatively tiny update could bode well for future MAS updates.
Interestingly, updates to OS X itself--from OS X 10.8.4 to 10.8.5, say--have been available as so-called delta incremental updates for some time, while Mac OS and iOS apps have typically required full replacement downloads.