Sorry for the double post, but I just noticed something when updating some apps on my iPhone running iOS 6.1.1 beta. Before this beta, when you had multiple apps needing an update, it would first download the first app's update, then before it installs it would start downloading the next app's update. Not the case anymore. Now it goes back to the old days by downloading and installing each app one at a time. It won't start the next app's download until the previous update is done installing.
Kinda hard to see in this screenshot but I noticed it when I had 4 apps to update recently.